I'm not sure how popular these platforms or forums are, but I will list them for you to see.

https://www.casinomeister.com/forums/
https://www.gamblingforums.com/
https://wizardofvegas.com/forum/gambling/
https://bonusparadise.com/forum/
https://www.worldcasinodirectory.com/
https://vegascasinotalk.com/forum/
https://www.gamblejoe.com/en/forum/

Some of the above-listed casinos platforms have regional restrictions, so I do not know your region so as to
be able to access them without a vpn but you can still access them with vpn to have a view of the forum and what is obtainable on their platform.