How to change primary user of an

Outside of Educational environments, iPad and iPhone are intended to be single-user devices. Unlike desktop computers, where you may have multiple user profiles/accounts, iOS/iPadOS devices have only a single signed-in user.

If you intend to give away the iPad, you would be well advised to prepare it properly for reuse - as this will ensure that the Activation Lock associated with the original AppleID is removed, along with all data and other sensitive information:

What to do before you sell, give away or trade in your iPhone, iPad or iPod touch – Apple Support

Otherwise, you can simply sign-out of iCloud and other Apple Services - but if you do so, be aware that all your personal and sensitive data will remain on the iPad.

With a better idea of your ultimate intentions, appropriate advice can be provided.