[OnePlus 9] akboy7015:
Something I found on Internet to describe what some process are:

# Chrome = Chrome browser. Be cautious as it will remove your webview, which is necessary to make some apps work. You should make sure you have one installed (Bromite or Android System Webview)

# CNEService = necessary in order to make VoWIFI work. Don't delete it if you're in the US (or any other country using it).

# colorservice = ???

# datastatusnotification = allows to cap data when you've reached the limit of your plan

# daxService = might be related to Amazon.

# DeskClock = clock app (not only widget, so don't delete except if you use another clock app)

# DiracManager = Audio manager for the OP6. Not necessary imo

# EmergencyInfo = could break double tap power button to launch camera, as well as being the app necessary to setup emergency info (obviously)

# GoogleTTS = Text to Speech, it's for disabled persons. I'm sorry if you need it but unfortunately it's useless for a majority of people.

# HotwordEnrollmentXGoogleWCD9340 = makes OK Google work (you might also to keep the Google app (Velvet)

# ManagedProvisioning = Work Profile Setup apk. It's useless for most people. Obviously don't delete it if your company gave you this phone, but then you shouldn't flash it in the first place! :)

# NVBackupUI = OnePlus Backup solution. goes with OPBackup

# OPAod = ambient display

# OPAppCategoryProvider = make battery stats work properly

# OPBackup = system updater

# OPBreathMode = New zen mode from OP

# OPCellBroadcastReceiver = gives you alerts when there's a big issue like a natural disaster, I've never seen it in action and I think most countries don't have it. It could be important to you so be careful.

# OPOnlineConfig = DONT REMOVE IT or you won't be able to boot.

# OPSafe = it allows to see data usage in settings

# OPSimContacts = breaks partially OP dialer if removed

# OpSkin = necessary for substratum

# QdcmFF = some Qualcomm software to make the screen better. I don't think it's used on the OP6 and it would probably make colors less accurate.

# Phonesky = Play Store

# PrintSpooler = if removed, break settings (bluetooth/connection preferences)

# PlayAutoInstallConfig = basically allows the OEM or the carrier to download application behind your back, great feature :)

# Qmmi = allows to check your hardware to make sure you don't have any feature not working (camera, vibrator, flashn, etc.)

# RemoteSimLockAuthentication = ???

# SeempService = solution from Qualomm meant to possibly fight against Malware... Don't trust it.

# SharedStorageBackup = not sure, probably related to Google Backup, caution with this one. Couldn't find any good explanation anywhere I've been using my phone without it for months without any issue.

# Stk = can be necessary for some banking apps (northern Europe apparently)

# Tags = NFC Tags (it's not used by 99,9% of the population)

# Turbo = device health services

# uceShimService = ???

# uimremoteclient = qualcomm bull****

# Velvet = Google app

# WebViewStub = not necessary with chrome webview

# WfdService = Wifi Direct

# workloadclassifier = ???

# usb_drivers.iso = when you plug your phone to your PC, it shows the phone as a CDROM so you can install drivers. Should be useless if you already have TWRP. ;)

# GoogleOneTimeInitializer + OnePlusWizard + SetupWizard : to delete only after setting up the device

# /vendor/etc/apps : folder full of amazon junk apps.