Hey there sandew256,
It's possible the beta software might not have been removed completely. If you haven't already, please connect to a computer to restore iPadOS
For help with uninstalling beta OS, use these steps:
Remove the public beta by deleting the beta profile
If you used a computer to install an iOS or iPadOS beta, you need to restore iOS or iPadOS to remove the beta version.
The easiest way to remove the public beta is to delete the beta profile, then wait for the next software update. Here's what to do:
1. Go to Settings > General, and tap VPN & Device Management.
2. Tap the iOS Beta Software Profile.
3. Tap Remove Profile, then restart your device.
When the next public version of iOS or iPadOS is available, install it to move back to a non-beta version of iOS or iPadOS. If an update is already available, you can install it by going to Settings > General > Software Update, but the iOS or iPadOS version must be later than the version you have.
If you don't want to wait for a software update to install a non-beta version of iOS or iPadOS, follow the steps to restore iOS or iPadOS.
Continue with the steps under "Remove the developer beta by restoring your device" here: How to uninstall iOS or iPadOS beta software - Apple Support
Take care!