I played before in Bitsler when they only offer casino games, I looked into the games and I couldn't find the old public roulette game where all people place bet at the same time. May I asked what happened to that game? I see only the roulette where you can play only with yourself.
I think that was around 2017 or 2018, they have improved some of their games but I think you are looking at the flash roulette
https://www.bitsler.com/en/flash-roulette is this what you are looking for? It is like casino roulette where they pick random number to have some bonus. They have in-house games, casinos and sports betting. You really can see their improvement.