[Xiaomi Poco X3 NFC Guides, News, & Discussion] bacitoto:
MIUI comes with a lot of unecessary apps, some are just there for ads, and some are android system apps that you can't uninstall or disable

There will be some slightly different apps between variants I'm on MIUI GLOBAL 12.0.2

I used Xiaomi ADB Fastboot Tools by Szaki, has a nice interface and is super simple to use, here's how:

Method#1 Xiaomi ADB Fastboot Tools

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Install java 11: https://adoptopenjdk.net/

Download latest XiaomiADBFastbootTools.jar

phone:

Enable Developer Options: Settings->About Phone->Click MIUI version untill it notifies you enabled dev options

Enable usb debugging: Settings->Aditional Settings->Developer Options

Connect phone to PC and select PTP mode, not FTP

Now you can select all the apps you wan't to remove. Use The LIST to know all the apps you can remove that won't cause bootloop. Here's a screenshot of the apps I left on my device, you can safely remove all the others

or you can try similar tools:

https://xdaforums.com/t/tool-adb-appcontrol-1-7-5-ultimate-app-manager-debloat-tool-tweaks.4147837/

Method#2 ADB command line

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To be able to execute ADB commands, you must download and set up the latest SDK Platform Tools on your computer.

Extract the downloaded ‘platform-tools-latest-windows.zip‘ and open the folder.

Launch the Command Prompt via the Windows context menu by pressing the Shift key + Right-click button on the mouse.

Now type the following command in the cmd window and Allow USB debugging to authorize ADB when prompted.

adb devices

allow usb debugging on xiaomi - If you see the ‘list of attached devices’ message, it means your Xiaomi or Redmi phone is successfully connected.

Now, execute the command

adb shell

When you get your phone’s codename on the cmd screen, run the command mentioned. Don’t forget to replace <package name> with the package name of the system app you want to uninstall just check The List

pm uninstall --user 0 <package name>

You should be able to remove all google apps to, every other app from the need testing list is also from a safe to remove thread, but needs confirmation on poco x3

[The LIST] - safe to uninstall apps

com.android.chrome | Chrome Browser (you may loose webview)
com.android.deskclock | Stock Clock app
Google Bloatware on Xiaomi Phones
com.google.android.apps.docs | Google Docs
com.google.android.apps.maps | Google Maps
com.google.android.apps.photos | Google Photos
com.google.android.apps.tachyon | Google Duo
com.google.android.apps.subscriptions.red | Google One
com.google.android.music | Google Play Music
com.google.android.videos | Google Play Movies & TV
com.google.android.feedback | Feedback app
com.google.android.youtube | Youtube
com.mi.android.globalminusscreen | App Vault
com.mi.android.globalFileexplorer| Mi File Manager
com.mi.globalbrowser | Mi Browser
com.mipay.wallet.in | Mi Wallet (India)
com.miui.analytics | MIUI Analytics (spyware)
com.miui.backup | Backup app
com.miui.bugreport | Bug reporting app
com.miui.calculator | Mi Calculator
com.miui.cleanmaster | System Cleaner
com.miui.cloudbackup | Cloud Backup service
com.miui.cloudservice | Cloud service
com.miui.micloudsync | Cloud Sync
com.miui.cloudservice.sysbase | Cloud service
com.miui.compass | MIUI Compass
com.miui.fm | MIUI FM
com.miui.freeform | MIUI Picture in Picture service
com.miui.hybrid | Quick Apps (data mining app)
com.miui.hybrid.accessory | Quick Apps (data mining app)
com.miui.miservice | Services & feedback
com.miui.mishare.connectivity | Mi Share
com.miui.miwallpaper | Wallpaper app (may not change lockscreen wallpaper after)
com.miui.msa.global | MSA or MIUI Ad Services
com.miui.notes | Notes
com.miui.phrase | Frequent phrases
com.miui.player | Music Player
com.android.soundrecorder | Sound Recorder
com.miui.screenrecorder | Screen Recorder
com.miui.touchassistant | Quick Ball feature
com.miui.videoplayer | MIUI Video player
com.miui.weather2 | Weather app
com.miui.yellowpage | Yellow Page app
com.xiaomi.account | Mi Account
com.xiaomi.calendar | Mi Calendar
com.xiaomi.discover | Xiaomi System apps updater
com.xiaomi.glgm | Games
com.xiaomi.joyose | Junk and safe to remove
com.xiaomi.midrop | Mi Drop
com.xiaomi.mipicks | GetApps(Xiaomi app store)
com.xiaomi.miplay_client
com.xiaomi.mircs | MIUI to MIUI Message
com.xiaomi.mirecycle | Mi Recycle (MIUI Security Cleaning)
com.xiaomi.misettings | Mi Settings
com.xiaomi.payment | Mi Pay
com.xiaomi.scanner | Scanner app
com.xiaomi.xmsf | Xiaomi Service Framework
com.xiaomi.xmsfkeeper | Xiaomi Service Framework
com.netflix.partner.activation | Netflix
com.netflix.mediaclient | Netflix
com.tencent.soter.soterserver | Chinese Payment service
com.facebook.appmanager | Facebook
com.facebook.services | Facebook
com.facebook.system | Facebook
com.facebook.katana | Facebook

Tested by other users:

com.miui.daemon | Miui Daemon
com.google.android.gm | Gmail
com.google.android.gms | Gmail service
com.mi.android.globallauncher | POCO Launcher (Safe to remove BUT you'll need another launcher installed first or you won't be able to use phone)

Apps that need testing list

com.android.browser | Web Browser
com.android.providers.downloads.ui | Downloads app
com.android.providers.partnerbookmarks | Partner Bookmarks
com.android.bips | Default Printing Service
com.android.bookmarkprovider | Bookmark Provider
com.android.calendar | Calendar app
com.android.cellbroadcastreceiver
com.android.cellbroadcastreceiver.overlay.common
com.android.dreams.basic | Screensaver app
com.android.dreams.phototable | Screensaver app
com.android.egg z| Android Easter Egg
com.android.emergency | SOS Calling
com.android.mms | MMS app
com.android.mms.service | MMS
com.android.printspooler | Printing service
com.android.statementservice | Checks APK files
com.android.stk | SIM Tool-kit
com.android.thememanager
com.android.thememanager.module
com.android.wallpaper.livepicker | Live wallpaper
com.android.wallpaperbackup | Wallpaper backup feature
com.android.wallpapercropper | Wallpaper cropping feature
com.android.hotwordenrollment.okgoogle | OK Google
com.google.ar.lens | AR Lens
com.google.android.apps.wellbeing | Digital Wellbeing
com.google.android.gm | Gmail
com.google.android.gms | Gmail service
com.google.android.gms.location.history | Gmail location service
com.google.android.googlequicksearchbox | Google Quick Search
com.google.android.inputmethod.latin | Gboard
com.google.android.marvin.talkback | Talkback feature
com.google.android.printservice.recommendation | Mobile Printing
com.google.android.syncadapters.calendar | Calendar Sync
com.google.android.tts | Text-to-speech
com.mi.health | Mi Health
com.mi.webkit.core | Mi Webkit
com.mipay.wallet.id | Mi Wallet
com.miui.aod | MIUI Always-on Display
com.miui.android.fashiongallery | Wallpaper Carousel (CAREFULL can't remove with Fastboot Tools)
com.miui.userguide | User Guide app
com.miui.gallery | MIUI Gallery
com.xiaomi.micloud.sdk | Cloud App
com.miui.face | MIUI Biometric
com.miui.fmservice| MIUI FM (needs testing might loose FM on device)
com.miui.wmsvc WMService
com.miui.vsimcore VsimCore
com.xiaomi.finddevice | Find my device service

all the system packages MIUI Global 12.0.2

package:com.miui.screenrecorder
package:com.android.cts.priv.ctsshim
package:com.qualcomm.qti.qcolor
package:com.android.internal.display.cutout.emulation.corner
package:com.google.android.ext.services
package:com.qualcomm.qti.improvetouch.service
package:com.android.internal.display.cutout.emulation.double
package:com.android.providers.telephony
package:com.android.dynsystem
package:com.miui.powerkeeper
package:com.goodix.fingerprint
package:com.google.android.googlequicksearchbox
package:com.miui.qr
package:com.android.providers.calendar
package:com.google.android.apps.googleassistant
package:com.android.providers.media
package:com.milink.service
package:com.qti.service.colorservice
package:com.google.android.onetimeinitializer
package:com.google.android.ext.shared
package:com.android.internal.systemui.navbar.gestural_wide_back
package:com.xiaomi.powerchecker
package:com.qualcomm.qti.simcontacts
package:com.xiaomi.account
package:com.android.wallpapercropper
package:com.android.theme.color.cinnamon
package:miui.systemui.plugin
package:com.xiaomi.mi_connect_service
package:com.xiaomi.micloud.sdk
package:com.android.theme.icon_pack.rounded.systemui
package:com.android.updater
package:com.android.externalstorage
package:com.qualcomm.uimremoteclient
package:com.android.htmlviewer
package:com.miui.extraphoto
package:com.miui.securityadd
package:com.qualcomm.qti.uceShimService
package:com.android.companiondevicemanager
package:com.miui.gallery
package:com.android.mms.service
package:com.android.providers.downloads
package:com.google.android.apps.messaging
package:com.android.networkstack.inprocess
package:com.miui.securitycenter
package:com.android.theme.icon_pack.rounded.android
package:vendor.qti.hardware.cacert.server
package:android.autoinstalls.config.Xiaomi.qssi
package:com.qualcomm.qti.telephonyservice
package:com.qualcomm.qti.performancemode
package:com.android.theme.icon_pack.circular.themepicker
package:com.google.android.overlay.gmsgsaconfig
package:vendor.qti.iwlan
package:com.google.android.configupdater
package:com.android.systemui.icon.overlay
package:com.google.android.overlay.modules.permissioncontroller
package:com.qualcomm.uimremoteserver
package:com.qti.confuridialer
package:com.miui.guardprovider
package:android.qvaoverlay.common
package:com.google.ar.lens
package:com.android.vending
package:com.android.pacprocessor
package:com.android.simappdialog
package:com.android.settings.overlay.miui
package:com.miui.notification
package:android.overlay.common
package:com.android.internal.display.cutout.emulation.tall
package:com.miui.daemon
package:com.android.networkstack.overlay
package:com.android.certinstaller
package:com.android.theme.color.black
package:com.android.carrierconfig
package:com.google.android.marvin.talkback
package:com.android.theme.color.green
package:com.android.theme.color.ocean
package:com.android.theme.color.space
package:com.android.internal.systemui.navbar.threebutton
package:com.qti.qualcomm.datastatusnotification
package:android
package:com.android.systemui.notch.overlay
package:com.qualcomm.qti.callfeaturessetting
package:com.qualcomm.wfd.service
package:android.miui.overlay
package:com.miui.vsimcore
package:com.miui.securitycore
package:com.android.theme.icon_pack.rounded.launcher
package:com.qti.qualcomm.deviceinfo
package:com.android.egg
package:com.android.mtp
package:com.android.nfc
package:com.android.ons
package:com.android.stk
package:com.android.backupconfirm
package:com.xiaomi.simactivate.service
package:com.goodix.gftest
package:com.longcheertel.sarauth
package:com.android.internal.systemui.navbar.twobutton
package:com.android.provision
package:org.codeaurora.ims
package:com.android.statementservice
package:com.android.hotspot2
package:com.google.android.gm
package:android.overlay.target
package:com.miui.system
package:com.android.settings.intelligence
package:com.miui.global.packageinstaller
package:com.android.internal.systemui.navbar.gestural_extra_wide_back
package:com.google.android.permissioncontroller
package:com.miui.systemui.devices.overlay
package:com.qualcomm.qti.dynamicddsservice
package:com.google.android.setupwizard
package:com.miui.cit
package:com.miui.rom
package:com.qualcomm.qcrilmsgtunnel
package:com.android.providers.settings
package:com.android.sharedstoragebackup
package:com.xiaomi.location.fused
package:com.android.printspooler
package:com.miui.misound
package:com.qualcomm.qti.services.systemhelper
package:com.android.theme.icon_pack.filled.settings
package:com.android.dreams.basic
package:com.google.android.overlay.modules.ext.services
package:com.android.systemui.gesture.line.overlay
package:com.fido.xiaomi.uafclient
package:com.android.se
package:com.android.inputdevices
package:com.google.android.apps.wellbeing
package:com.fido.asm
package:com.google.android.dialer
package:com.miui.documentsuioverlay
package:com.android.bips
package:com.qti.dpmserviceapp
package:com.android.theme.icon_pack.circular.settings
package:com.fingerprints.extension.service
package:com.android.fileexplorer
package:com.qti.xdivert
package:com.android.systemui.overlay.miui
package:com.google.android.overlay.gmsconfig
package:com.google.android.apps.maps
package:com.google.android.modulemetadata
package:com.miui.face.overlay.miui
package:com.android.cellbroadcastreceiver
package:com.google.android.webview
package:com.android.theme.icon.teardrop
package:com.google.android.contacts
package:com.android.server.telecom
package:com.google.android.syncadapters.contacts
package:com.android.keychain
package:com.qti.snapdragon.qdcm_ff
package:com.android.camera
package:com.xiaomi.xmsf
package:com.android.theme.icon_pack.filled.systemui
package:com.google.android.packageinstaller
package:com.google.android.gms
package:com.google.android.gsf
package:com.google.android.ims
package:com.google.android.tts
package:com.android.phone.overlay.common
package:com.qualcomm.qti.qtisystemservice
package:com.android.carrierconfig.overlay.common
package:com.android.calllogbackup
package:com.google.android.partnersetup
package:android.aosp.overlay
package:com.android.systemui.overlay.common
package:com.xiaomi.xmsfkeeper
package:com.android.server.telecom.overlay.common
package:com.android.localtransport
package:com.android.carrierdefaultapp
package:com.dsi.ant.server
package:com.longcheertel.secretcode
package:com.qualcomm.qti.remoteSimlockAuth
package:com.xiaomi.finddevice
package:com.android.theme.font.notoserifsource
package:com.android.theme.icon_pack.filled.android
package:com.android.proxyhandler
package:com.qualcomm.qti.workloadclassifier
package:com.android.theme.icon_pack.circular.systemui
package:com.mi.android.globalFileexplorer
package:com.miui.wmsvc
package:com.google.android.overlay.modules.permissioncontroller.forframework
package:com.xiaomi.misettings
package:com.google.android.feedback
package:com.google.android.printservice.recommendation
package:com.google.android.calendar
package:com.android.managedprovisioning
package:com.fingerprints.sensortesttool
package:com.google.android.documentsui
package:com.android.dreams.phototable
package:com.miui.audiomonitor
package:com.android.smspush
package:com.android.wallpaper.livepicker
package:com.android.apps.tag
package:com.android.systemui.navigation.bar.overlay
package:com.xiaomi.bluetooth
package:com.android.theme.icon.squircle
package:com.android.storagemanager
package:com.android.bookmarkprovider
package:com.android.settings
package:com.qualcomm.qti.cne
package:com.qualcomm.qti.ims
package:com.qualcomm.qti.lpa
package:com.qualcomm.qti.uim
package:com.android.theme.icon_pack.filled.launcher
package:com.android.networkstack.permissionconfig
package:com.google.android.projection.gearhead
package:com.qualcomm.location
package:com.google.android.apps.turbo
package:com.android.cts.ctsshim
package:com.android.theme.icon_pack.circular.launcher
package:com.qualcomm.qti.uimGbaApp
package:com.qti.diagservices
package:com.miui.systemui.carriers.overlay
package:com.miui.systemui.overlay.devices.android
package:com.qualcomm.qti.services.secureui
package:com.xiaomi.bluetooth.overlay
package:com.android.vpndialogs
package:com.longcheertel.cit
package:com.android.phone
package:com.android.shell
package:com.android.theme.icon_pack.filled.themepicker
package:com.android.wallpaperbackup
package:com.android.providers.blockednumber
package:com.android.providers.userdictionary
package:com.google.android.apps.setupwizard.searchselector
package:com.android.emergency
package:com.qualcomm.qti.seccamservice
package:com.qualcomm.qti.qmmi
package:com.google.android.gms.location.history
package:com.android.internal.systemui.navbar.gestural
package:com.android.location.fused
package:com.android.theme.color.orchid
package:com.android.systemui
package:com.android.wifi.resources.xiaomi
package:com.android.theme.color.purple
package:com.android.bluetoothmidiservice
package:com.qualcomm.qti.confdialer
package:com.qualcomm.qti.poweroffalarm
package:com.qti.ltebc
package:com.mi.globallayout
package:com.xiaomi.discover
package:com.google.android.overlay.setupwizard
package:com.android.thememanager
package:com.android.traceur
package:com.miui.fmservice
package:com.android.thememanager.module
package:com.lbe.security.miui
package:com.android.bluetooth
package:com.qualcomm.timeservice
package:com.qualcomm.atfwd
package:com.qualcomm.embms
package:com.android.providers.contacts
package:com.android.captiveportallogin
package:com.android.theme.icon.roundedrect
package:com.android.internal.systemui.navbar.gestural_narrow_back
package:com.android.cellbroadcastreceiver.overlay.common
package:com.android.theme.icon_pack.rounded.settings
package:com.miui.core
package:com.miui.face
package:com.google.android.inputmethod.latin
package:com.android.bluetooth.overlay.common
package:com.miui.audioeffect
package:com.android.theme.icon_pack.circular.android
package:com.google.android.apps.restore

Credits/Sources:

https://selivan.github.io/2020/02/25/removing-bloatware-from-xiaomi-miui-android.html

https://xdaforums.com/redmi-note-7/how-to/remove-redmi-note-7-bloatware-root-t3925049

https://devcondition.com/article/removing-unneeded-miui-applications/