If we are to even consider the replies on this thread on recommendations for the platforms that accept the use of VPN, I don't think there are suggestions made and if any at all, they are not many, gambling platforms don't usually demand or take in the use of VPN for their website, but Incase we see some that allows for that, maybe they are just new in the business or doesn't have enough resources to employ for the measures that take care on that.
Most of the new casino is the one that very strict on VPN users because they are strictly complying with their license and at the same time to protect their casino from multiple account abuse.
Most of the casino that is still VPN friendly are those established one since they want their loyal customers to become free as much as possible. Big online casino has system that can detect if users have VPN that use to bypass the casino rules that’s why they are confident to allow VPN with their players.
I guess that site either go "full rogue" like no KYC, no questions and sometimes the chance of them simply disappearing in an exit scam, versus the all compliant sites that really care about being always in the right side of the (US mostly) regulations for gambling and money laundering. Essentially, you have to chose the first category if you are seeking to use VPN.