Steam multiplayer game help!

I have built a shooter game on unreal engine 5. It’s going to be online multiplayer through Steam, pc only. I integrated advanced sessions and used the steamworks sdk. I tested the game standalone, and the steam interface appears, so it’s connects to steam just fine. For some reason there are no lobbies or sessions popping up when Steam(and myself)test it, therefore my build is being rejected by Steam. I’m looking for someone to go over my files & fix the issue. I have been troubleshooting for weeks & have not found the solution.