No worries, if you don't have access to your old email id that you have registered with Cash App. Thankfully, Cash App login to an old account is possible with an email address as well. All you need is just enter your email id instead of your old registered phone number with Cash App. The purpose of entering an email id is the same and that is to confirm you are the right person to get access to a Cash App account.
How to reset the for***ten Cash App PIN of an old account?