And you're forgetting licensed casinos are combating against money laundering, they wouldn't give easy for any gamblers that using Monero to gamble on their casino. I think any gamblers that using Monero will be asked to submit KYC regardless how much the amount. This will help them to track about the account activity and which address the gamblers will send their coins to.
7.3.1. We accept BTC, ADA, ALGO, AVAX, BCH, BNB, BUSD, DAI, DASH, DOGE, DOT, EOS, ETC, ETH, FTM, stETH, LINK, LTC, LUNC, MATIC, PAXG, SHIB, SOL, TRON, UNI, USDC, USDP, USDT, USTC, XLM, XRP, ZCASH and fiat deposits (depending on your jurisdiction).
I am quoting the TOS for deposits which are only accepted for some crypto and fiat coins, there is no option for Monero (XMR) so no support for deposits and withdrawals. I don't know if monero has been removed due to regulations regarding AML, because AML aims to make it easier to track suspicious deposits or withdrawals so that users have to complete KYC, also minimize cases of money laundering using transaction traffic on the casino platform to eliminate traces of tracking.