Have you come across Nakama? https://heroiclabs.com/nakama https://heroiclabs.com/nakama. It's available as a paid service, or free to self host. It integrates

Have you come across Nakama? https://heroiclabs.com/nakama https://heroiclabs.com/nakama. It's available as a paid service, or free to self host. It integrates nicely with engines like Unity / Unreal, but is equally usable for a browser based game.