Try to build your own prototype. I found a fairly low-friction way to add a custom online services subsystem into UE4/5: https://github.com/RyroNZ/UE4MasterSer

Try to build your own prototype. I found a fairly low-friction way to add a custom online services subsystem into UE4/5: https://github.com/RyroNZ/UE4MasterServer https://github.com/RyroNZ/UE4MasterServer You can replace the python with anything that lives across JSON. I had no issues getting this to compile & load in UE5. Once you have this in place, you could grab one of their arena shooter MP prototypes and focus almost entirely on the sessions, servers, matchmaking, accounts, logging, fleet management, etc.