Thank you for replying, and for patiently doing what you could to verify.
If your identity is unable to be verified, you won't be able to use all of the features of Apple Cash, including sending and receiving money and adding money to your Apple Cash balance.
You can use the money in your Apple Cash account to make purchases with Apple Pay in stores, in apps, and on the web, and you can transfer money to your bank.
Eg: How to:
Transfer money in Apple Cash to your bank account or debit card - Apple Support
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Is there a way to verify my identity outside of the app since that doesn't appear to be working?
If you have supplied all the info. requested for verification without success:
You might want to contact Apple Cash Support for help (online chat / phone / email etc.):
There is a "Get Support - start now" link at the bottom of their website (link below):
Apple Cash - Official Apple Support