Cross-Platform Multiplayer Development for VR/Android/Android VR/Linux/Desktop

Hi,
I am looking for solution of cross platform multiplayer.I want to develop a multiplayer game for cross platform.
In which all player from android,Windows,VR,ios.

I know pixel streaming but i am looking for another solution like photon network
Like in other game engine i can use photon plugin to play a single game instance from users of different platform.

In short
1 game instance should be able to connect player from Android,Windows,VR.

Photon is available for Unreal Engine as well.

Hi ,

Any approach or solution you figured out ?