Cannot join Multiplayer

[Nerf]

We both just purchased grounded 2 on steam for our pc's and we can't join any lobbies, I made a multiplayer lobby but my partner could not join me and then i tried it the other way around where she made a lobby but i can't join her either.

Just keeps coming up with a an error message or a message saying connection lost. We havnt been able to play together since we bought the game. No matter what we do we cannot join each others game. we dont want to play this game solo. We got the game so we could enjoy it together.

I also tried to play around with the NAT type and port forwarding to see if there was something that was blocking it. But couldnt find anything issues. Still cannot join any game sessions.

Whats happening are they not allowing us to play multi? We are based in Australia.

Ive seen so many yourubers play this game and with 4 players.