Can not create Apple ID
Unable to communicate with apple cloud and cannot login to Apple Store
iPad Air 4 Wi-Fi
You are sign in here . . . with your Apple ID & Password.
Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.
You can’t merge multiple Apple ID accounts.
What happens when you use the same Apple ID & Password that you use to sign in here?
See also -> If you can't connect or sign in to iCloud
If you can't connect or sign in to iCloud - Apple Support
OR see -> Having trouble signing in?
https://iforgot.apple.com/password/verify/appleid