Probably simplest solution is to keep current behaviour and get a second iPad for notes.

Any self-respecting Apple user has at least three iPads.

Per family member, of course.

The Apple Home View is proof that Apple could implement some kind of user switching / login and log out scheme if they wanted to do so on the iPad as well.

Fleet managed devices already have it.

Apple Business Manager and Apple School Manager can remotely configure it on managed iPads.

downloadmoreipads dot com

This reminds me of a response from a Microsoft MVP on a question about reducing storage usage by stale installer files in Windows folder:

"Essentially to reduce the space used you need to increase the size lf your storage"

That reminds me of hotmail's 50GB limit that cannot be changed. This created so much pain for some non-technical people I know (missed important emails, then having to spend days deliberating what to delete etc)

This must have been why they had so many extra PADDs in Star Trek. The only real way to multi-task!