If you have a iPad Air3, then performance you describe is not characteristic of this model.
Please verify that you are running iPadOS 13.3.1 - or if not, update to this version:
Settings > General > About
Settings > General > Software Update
Next, you should force restart your iPad:
https://support.apple.com/en-gb/guide/ipad/ipad63d30b5a/ipados
If this doesn’t resolve the issue, ensure you have a current iCloud or iTunes backup of your device, then attempt a full system restore of the iPad by connecting your iPad to PC (with iTunes installed) or a Mac. The Restore process will reset the iPad, install a fresh copy of the latest supported version of iPadOS (at time of writing, this is iPadOS 13.3.1) and optionally restore any data from your iCloud/iTunes backup.
https://support.apple.com/en-gb/HT201252
This will hopefully remediate and resolve any performance issues that you may be experiencing - and resolve the problem.