Check whether “instant” means quick approval or money reaching your account;...

https://wiki-byte.win/index.php/Can_Casinos_Reverse_a_Withdrawal_and_Put_It_Back_in_Your_Balance%3F

Check whether “instant” means quick approval or money reaching your account; those are separate steps. A “no KYC” claim may still allow checks. Bonus wagering rules and withdrawal limits can delay or cap a cashout.