What happens if you can’t remember your iCloud password?
This Apple ID and password is another device that is not in this list below
Question marked as
You would be locked out of your account, and potentially any devices the account is logged in to.
You can try to recover your password by following the steps here ➡️ If you forgot your Apple ID password - Apple Support
Or apply for account recovery by following the steps here ➡️ How to use account recovery when you can’t reset your Apple ID password - Apple Support