My MacBook Pro is stuck on the update and I’ve done many of the suggestions to no avail.

Please some context.

Update as in Catalina Security Update 2021-006 or does one mean upGrade from Catalina to Big Sur?

If the Security Update of Catalina - should down by Power Button. Connect to charger. Disconnect all external devices.. Restart in Safe Mode Safe mode may help you resolve or isolate problems that you’re having with your Mac. When you start up in safe mode, your Mac prevents some software, such as startup items, from loading, and it performs a check of your startup disk. Your Mac may take longer to start up because of the check.

If the upGrade to Big Sur - same actions. This may or may not allow the upgrade process to complete.