Through online you can even use different names or identity in which where most gambling platforms having difficulty with.
Most of centralized casino write in their terms of service where the gambler need to use real name, identity etc and not the fake one. If someone input fake name or fake identity, when the casino ask your KYC, you will have a problem because your personal information is different with your information in the casino's account.
I think there's no discrimination in online casino, they will act fair and don't care about your appearance.