Steam overlay without the sessions

I’m trying to get the steam overlay without the session handling, the subsystem and netdriver.

The goal is to run a dedicated server with no steam that I can connect to with a steam overlayed game

Is that possible?

Still unknown

You can now (since 4.22) use bUseSteamNetworking=false inside of [OnlineSubsystemSteam] - this fixes it for me! Steam overlay on clients works, dedicated server uses default net driver, client joins via default net driver.