Can I delete Notes app on iPad and reinstall?

Yes. If running iOS 15, the Notes App is deletable and can be re-downloaded from the App Store.

https://apps.apple.com/us/app/notes/id1110145109

reply to : jpdies ; 📝 Notes on iPad

Yes ,

on home screen … touch & hold the app icon … remove app…delete .

To retrieve it : go to the App Store … in search " notes app for iPad " … ☁️tap the cloud with ⬇️ a downward arrow to restore the app .