How to transfer money I received via Apple Cash to an external bank account?

You can only transfer money to your Bank Account or to a Debit Card you own. If you attempt to transfer money to another account, you are likely to find that your account may be permanently locked as the bank would consider that fraudulent behavior claiming to own the account and violates the Terms of Use.

Transfer money in Apple Cash to your bank account or debit card - Apple Support

By instructing and authorizing us to process a Bank Transfer, you represent and warrant to us that: (i) the financial institution that holds the bank account you designate to receive money via the Bank Transfer expressly permits (or does not prohibit) Bank Transfers; (ii) you have the authority to instruct and authorize us to process the Bank Transfer; (iii) the information you provide to us regarding the bank account you designate to receive money via the Bank Transfer is accurate and complete; (iv) you are an owner and authorized signer on the bank account you designate to receive money via the Bank Transfer;

https://applecash.greendot.com/termsconditions/

Yes.

click here ➜ Transfer money in Apple Cash to your bank account or debit card - Apple Support

Jim – this why when funds are deposited by a stranger into an account, the actual account owner must not touch the funds and report incident/deposit/transfer to Green Dot. 😀