[Xiaomi Mi Mix 3 Guides, News, & Discussion] jcsww:
This thread is for those of us who don't root or that want to remove bloatware apps that usually require root to remove easily.

You will need ADB installed. You can use the Android SDK but personally, I use the installer for simplicity and install it system-wide. You can find the ADB 1.4.3 installer in this thread.

The following app packages, I have removed successfully using the following commands without any issues on MIUI 10.2.1.0, 10.2.2.0, and 10.3.1.0. If you want more information on what these apps are specifically, use Package Info from the Google Play Store.

Facebook: pm uninstall -k --user 0 com.facebook.system

Facebook: pm uninstall -k --user 0 com.facebook.appmanager

Facebook: pm uninstall -k --user 0 com.facebook.katana

Facebook: pm uninstall -k --user 0 com.facebook.services

Google Duo: pm uninstall -k --user 0 com.google.android.apps.tachyon

Google Maps: pm uninstall -k --user 0 com.google.android.apps.maps

Google Photos: pm uninstall -k --user 0 com.google.android.apps.photos

Google YouTube: pm uninstall -k --user 0 com.google.android.youtube

Google Docs: pm uninstall -k --user 0 com.google.android.apps.docs

Google Video: pm uninstall -k --user 0 com.google.android.videos

Google Music: pm uninstall -k --user 0 com.google.android.music

Xiaomi Games: pm uninstall -k --user 0 com.xiaomi.glgm

Mi Video: pm uninstall -k --user 0 com.miui.videoplayer

Mi Notes: pm uninstall -k --user 0 com.miui.notes

Mi Music: pm uninstall -k --user 0 com.miui.player

Mi Drop: pm uninstall -k --user 0 com.xiaomi.midrop

The following apk removal command is for the CMAS/Presidential Alert notifications. Normally, I would not recommend removing this, but sadly, Canadian authorities can't seem to grasp the concept of reasonable use (5 times in 2 minutes and every 5 minutes after for a half hour), so I had to remove this annoyance. By removing this, you accept the responsibilities and understanding of removing this form of emergency communication that could have potentially notify you of an emergency situation.

Cell Broadcasts for Alerts: pm uninstall -k --user 0 com.android.cellbroadcastreceiver

(Your device will NOT receive CMAS/Presidential Alerts after moving this)

Turning off App Vault in Settings, Home Screen & Recents also removes (hides) a few apps, like Feedback from the App Drawer depending on the launcher you are using. Personally, I use Nova Launcher but there are many excellent launchers out there. Changing the default launcher will break being able to change the lock screen background outside of using themes. However, you can switch back to the MIUI launcher for a second under Settings, Home Screen & Recents, set the lock screen background, then switch back to your preferred launcher of choice and the lock screen background will stick.

There are some more apps I will eventually test and potentially add to this removal list. Things like Mi Pay seem to be tied into the Xiaomi Store and Theme Store, which I do use, so I haven't toyed with removing it yet. For those questioning removing the YouTube apk. I use YouTube Vanced (non-root). It blocks ads and works exactly the same as the regular YouTube app. VLC Player from the Play Store is a great replacement for Mi Video and Mi Music in one app. If you use Facebook, Twitter, and other social media. Accessing them through your browser is a lot better than bloating out your device with plenty of apps that waste your battery and mine your data.