Hey guys, so my friend and I have tried several times to make it work and we finally found a way. Hopefully it does for you guys as well.
Go to F1 World > Play > Multiplayer Grand Prix
Create a lobby and go to Settings > Lobby settings and choose F1 2023 car. Now go back and go into Simulation settings and choose Equal Performance Off. After this you can quit session.
Now to the important part, you must create a NEW Two player-career to make it work and do all your settings. Do NOT invite your friend until you have the lobby up and running.
Hope this helps guys cause it did for us.
