I want to sign out

Your iPad is centrally managed by your Educational Establishment. This would imply that the iPad is likely owned by them - and not you.

Restrictions that they have applied to the iPad are centrally managed/controlled by them - and only they can modify or remove those restrictions from the iPad.

As ProustGiulio has already indicated, you will need to contact your School IT Administrator for guidance. I hope this clarification is helpful.

To bypass those restrictions, you need to contact your organization's IT admin/supervisor, asking them if you have rights to perform certain procedures.

Regards

Giulio

Try this:

Settings>ScreenTime>Content&Privacy Restrictions>... 1st option = DISABLE (gray).

When done, restart your iPad, then see if you can sign out.

Regards

Giulio

The information that we have would indicate that the device is managed by a third-party. This is the only known reason that Sign-out from iCloud would be inhibited.

Sign out from where? Doing what? Please better specify your needs.

Can you take a screenshot of that warning message and post it here?:--> Take a screenshot on your iPad - Apple Support

Thanks

Giulio

You are welcome

Giulio