Well, even in online games VR is very common and I saw Roblox games also had that VR.
I don't know how different in online games and the online casino, you need to move as well the same as your avatar. So --if no one will watching you, it will perhaps need a big space where you can move properly. I assuming all of these because I have never tried using virtual reality goggles and I think, for now, this is very expensive to buy.
It costs a lot of money to spend to be able to access such a Virtual room and we save more than having to gamble with 3x the cost. Indeed, this is only an alternative choice, when the world of Metaverse provides 3D Virtual-based online gambling. However, it seems that it has not been fully effective for those of us who are more dominant in gambling at casinos without having to face to face between avatars.
The purpose of a "virtual reality" game is for a person to experience an immersive reality of seeing/experiencing the fantasy world of magic, combat, war, etc. That is why, most VR games are associated with shooting, sword fighting or magic. Creating a VR game that focuses purely on gambling can be a bit mundane and boring to begin with as it can be easily done if you would just visit a physical casino yourself.
Like what I also previously mentioned, creating a VR game may costs thousands of $$$ to create and I doubt that developers would risk such money to create something that is easily achievable.