Apple Pay is a wallet on your phone. The casino charge still hits the card you stored in Apple Pay.
Where the cashier offers it, you approve the deposit with Face ID or a code. It is usually instant.
Apple Pay is almost never a withdrawal destination. The payout uses the underlying card only if the casino pays to cards, otherwise a bank account.
If the bank blocks gambling on that card, Apple Pay will fail too. The wallet does not hide the merchant category from the bank.
- The method has to be visible in your own cashier before you send money.
- The name on the payment and the name on the casino account have to match.
- A bonus can exclude this method. The offer text in the account beats any headline.