iCloud Recovery without Email, Phone, or Credit Card
How can you regain access to your account without using the email address phone number or credit cards on file and wait 73 hours or 21 days
[Re-Titled by Moderator]
iPhone 12, iOS 18
From what you say, account recovery is your only hope and you will simply have to wait and spend the time mulling over better ways of keeping track of identifying information in the future.
How to use account recovery when you can’t reset your Apple Account password - Apple Support