At the official support page of the Cash App, you will find out the right and feasible information on How to Verify Cash App Card for Apple Pay. Besides, if you come across some hassle regarding the same, you will need to have a word with the professionals who will help you out.
Apple Pay
Tap the Cash Card tab on your Cash App home screen.
Tap the image of your Cash Card.
Select Add to Apple Pay.
Follow the steps.
This may help, J Wick