icloud popup asking me to sign in with an old email address

The Apple ID created with gmail account say example1@gmail.com was permanently deleted from the gmail server , and if the account was set up with secondary authentication , the administrator can’t sign with iCloud account.

Sign in with rescue mail address in gmail account ( enter the password ) , click on personal info .

Click on edit , and try to add a new trusted number .

And can't further move , the bell icon will shake and stop and if you click on send the code that will go to the old trusted number that is inactive .

Click on more ways to verify , it again prompted to enter rescue mail address and password , Scroll down and click on account recovery icon , then add a new trusted number and click on next , the trusted number will add , the trick was using the rescue mail address that was attached to the primary mail address .