App store
Unable to download apps. Requires to log in to iTunes
iPad Air, iPadOS 16
Question marked as
Click on this link to find out how to sign in with your Apple ID --> Sign in with your Apple ID - Apple Support "After you log in, you can use the App Store, iCloud, iMessage, Apple Music, Apple TV+, and more."
Read this document if you can’t download or update apps on your iPhone or iPad --> If you can’t download or update apps on your iPhone or iPad - Apple Support
If the first 5 don't help, use the 6th.