iMessage Log back in
How do you log back into iMessage app with restrictions
iPad, iPadOS 15
Question marked as
You may need to change the restrictions that have been set - or disable restrictions altogether - and either will require the ScreenTime/Restrictions Passcode if enabled.
If you have forgotten the ScreenTime passcode, one of the two procedures outlined within this link should resolve the problem:
If you forgot your Screen Time passcode - Apple Support
If your iPad is capable of supporting iPadOS 13.x or later, you should update to the most current version before attempting to resolve a forgotten ScreenTime passcode. The more recent iPadOS updates have introduced a mechanism whereby a forgotten ScreenTime passcode can be reset without fully wiping the iPad.
To reset a forgotten ScreenTime passcode on older versions of iOS/iPadOS, the iPad must be reset “as new”, losing all locally stored data. In this situation, you’ll not be able to restore your data from an iCloud or iTunes backup - as the forgotten passcode is integral to the backup.