Why do I have to keep logging into my Apple ID
Why do I have to keeping into my Apple account
iPhone 12 Pro Max, iOS 15
See -> Require a password for App Store and iTunes purchases
Require a password for App Store and iTunes purchases - Apple Support
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.
Use the same Apple ID & Password that you use to sign in here.