How can iCloud be accessed by if Apple ID and password are forgotten
Need to delete phone from account
iPhone XR
Question marked as
You'll have to recover the Apple ID and password first.
See: If you forgot your Apple ID https://support.apple.com/en-us/HT201354 and
If you forgot your Apple ID password https://support.apple.com/en-us/HT201487
You also can use Having trouble signing in/iForgot https://iforgot.apple.com/password/verify/appleid
And you will need to see If you forgot the answers to your Apple ID security questions https://support.apple.com/en-us/HT201485
Before trying to answer your security questions is very important that you think about your questions, including your birth date, and their answers carefully and try to recall all details you can. If you don't answer them correctly enough, then you easily can lose control of your account.
Note that If you're using two-factor authentication and can’t recover your password, you usually will need to enter account recovery. See Recover your Apple ID when you can’t reset your password https://support.apple.com/en-us/HT204921.