Apple ID
I created 2 apple IDs. Now everything is all mixed up
How can I delete one of my Apple IDs?
iPhone XR, iOS 15
Question marked as
For information about how to delete your Apple ID account, click here --> How to delete your Apple ID account - Apple Support
Note that you may still have a lot of cleanup to do, plus if you bought anything with the other ID that you wish to retain then you may instead wish to entertain setting up Family Sharing with the other account: Set up Family Sharing - Apple Support