[OnePlus Nord N10 5G Questions & Answers] SomeRandomGuy:
This event has led an almost two-week-now jihad against forced updates for me. I've definitely killed it (the auto-update) but took out GS as well. Can't confirm exactly which it is, but I am happy to show my work:

First, get NetGuard: https://f-droid.org/en/packages/eu.faircode.netguard/ NO ROOT REQUIRED and you can filter apps that phone home.

If you are comfortable re-flashing, some trial and error will get it. This is my list (assumes you know how to do ADB shell and have root) (you could also delete rather than move to SDCard, but I had some I killed that bricked it and wanted to revert w/o reflash):

su
mount -o rw,remount /
mount -o rw,remount /product
mkdir /storage/emulated/0/bye
mv /product/app/Account /storage/emulated/0/bye/
mv /product/app/CalendarGoogle /storage/emulated/0/bye/
mv /product/app/Chrome /storage/emulated/0/bye/
mv /product/app/Drive /storage/emulated/0/bye/
mv /product/app/Duo /storage/emulated/0/bye/
mv /product/app/DynamicDDSService /storage/emulated/0/bye/
mv /product/app/Gmail2 /storage/emulated/0/bye/
mv /product/app/GoogleContacts /storage/emulated/0/bye/
mv /product/app/GoogleContactsSyncAdapter /storage/emulated/0/bye/
mv /product/app/GoogleLocationHistory /storage/emulated/0/bye/
mv /product/app/GooglePay /storage/emulated/0/bye/
mv /product/app/GoogleTTS /storage/emulated/0/bye/
mv /product/app/Maps /storage/emulated/0/bye/
mv /product/app/Messages /storage/emulated/0/bye/
mv /product/app/Photos /storage/emulated/0/bye/
mv /product/app/Videos /storage/emulated/0/bye/
mv /product/app/YTMusic /storage/emulated/0/bye/
mv /product/app/YouTube /storage/emulated/0/bye/
mv /product/app/remoteSimLockAuthentication /storage/emulated/0/bye/
mv /product/app/remotesimlockservice /storage/emulated/0/bye/
mv /product/priv-app/AndroidAutoStub /storage/emulated/0/bye/
mv /product/priv-app/CarrierServices /storage/emulated/0/bye/
mv /product/priv-app/ConfigUpdater /storage/emulated/0/bye/
mv /product/priv-app/GoogleDialer /storage/emulated/0/bye/
mv /product/priv-app/GoogleFeedback /storage/emulated/0/bye/
mv /product/priv-app/GoogleOneTimeInitializer /storage/emulated/0/bye/
mv /product/priv-app/GooglePartnerSetup /storage/emulated/0/bye/
mv /product/priv-app/GoogleRestore /storage/emulated/0/bye/
mv /product/priv-app/HotwordEnrollmentOKGoogleHEXAGON /storage/emulated/0/bye/
mv /product/priv-app/HotwordEnrollmentXGoogleHEXAGON /storage/emulated/0/bye/
mv /product/priv-app/OPAppLocker /storage/emulated/0/bye/
mv /product/priv-app/SetupWizard /storage/emulated/0/bye/
mv /product/priv-app/Velvet /storage/emulated/0/bye/
mv /product/priv-app/Wellbeing /storage/emulated/0/bye/
mv /product/priv-app/OobConfig /storage/emulated/0/bye/
mv /product/priv-app/Turbo /storage/emulated/0/bye/
mv /product/priv-app/Phonesky /storage/emulated/0/bye/
mv /product/priv-app/GmsCore /storage/emulated/0/bye/
mv /system/app/BackupRestoreRemoteService /storage/emulated/0/bye/
mv /system/app/CompanionDeviceManager /storage/emulated/0/bye/
mv /system/app/OPLocalUpdate /storage/emulated/0/bye/
mv /system/app/GoogleAssistant /storage/emulated/0/bye/
mv /system/app/GooglePrintRecommendationService /storage/emulated/0/bye/
mv /system/app/NVBackupUI /storage/emulated/0/bye/
mv /system/app/OPAppUpgrader /storage/emulated/0/bye/
mv /system/app/OPOnlineConfig /storage/emulated/0/bye/
mv /system/app/OPPush /storage/emulated/0/bye/
mv /system/app/PlayAutoInstallConfig /storage/emulated/0/bye/
mv /system/app/TSDM /storage/emulated/0/bye/
mv /system/app/OPBreathMode /storage/emulated/0/bye/
mv /system/priv-app/DynamicSystemInstallationService /storage/emulated/0/bye/
mv /system/priv-app/OnePlusGallery /storage/emulated/0/bye/
mv /system/priv-app/OnePlusWizard /storage/emulated/0/bye/
mv /system/priv-app/AmazonMDIP /storage/emulated/0/bye/
mv /system/priv-app/TagGoogle /storage/emulated/0/bye/
mv /system/priv-app/OPDeviceManager /storage/emulated/0/bye/
mv /system/priv-app/OPDeviceManagerProvider /storage/emulated/0/bye/
mv /system/reserve/OPBackupRestore /storage/emulated/0/bye/
mv /system/reserve/OPForum /storage/emulated/0/bye/
mv /system/reserve/OPNote /storage/emulated/0/bye/
mv /system/reserve/OPSoundRecorder /storage/emulated/0/bye/
mv /system/reserve/OnePlusPods /storage/emulated/0/bye/

Now the reason this took so long is I have a bunch of (paid) apps that all link to GS and verify I bought it... so I need to find OSS replacements (F-droid et al) for a lot of them. Additionally, most of the custom roms come with AOSP apps for dialer, contacts, etc... the list above kills the OnePlus ones but does not replace them.

Hope the above helps someone!