Trying to create more storage on iPad but my Notes app is taking more & MORE

Begin with a forced-restart of your iPad - as this will often clear both an isolated software issue and unnecessary cached data:

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.

If you continue to experience difficulties, you would be best advised to seek assistance directly from from Apple Support:

Official Apple Support

Alternatively, you can initiate and manage your support cases using the excellent Apple Support App. If not already installed on your iPad, the App can be downloaded from the App Store:

https://apps.apple.com/gb/app/apple-support/id1130498044

To reduce storage used by apps like Apple Notes, Notion and Noteshelf:

Can can check this process

• Delete unneeded notes.
• Remove or link large attachments.
• Use cloud storage.
• Clear app cache.
• Regularly clean up notes.

By implementing these strategies, you can effectively manage your storage and keep your note-taking apps running efficiently.

You are very welcome.