Battery drain on my I pad pro M2 when l’m not in use. iPad OS version 17.1 .1

Remove the Messenger and Facebook Apps from your iPad - and then perform a forced-restart:

Remove apps from iPad - Apple Support

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

Force restart iPad (models with the Home button)

Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.

After restarting your iPad, you can re-install the previously removed Apps from the App Store.