The way I found this out might be helpful to any of you that can't process transactions. After having my payment fail multiple times through many vendors (Apple Pay, PayPal, Google Pay) using the same bank debit card/bank account to process AirBnB transactions I called Axos.
After speaking with them multiple times and hearing the same 'ol "nothing is wrong with our bank or your card sir it must be AirBnB's issue". I raised the issue of my card/bank account not working with Cash App either. They said that was true and that they were blocking transactions with Cash App. I then asked if they'd could check their "blocked list" and sure enough AirBnB was on it.
So moral of the story is ask the right questions. Your institution may have some unofficial list of companies they block and the Customer Service agent is unaware of it. All they will do on their own accord is look at your most recent transactions to see if any were blocked. However, this doesn't show their universal blocks of companies they don't allow transactions with.
I hope this helps anyone getting the run around. We called our bank several times and AirBnB multiple times as well. Come to find out it is our bank.