Ps5 multiplayer still doesn't work

Ever since the release the multiplayer for goat sim 3 still doesn’t work. The devs insist it’s because of “port forwarding not enabled” but that shouldn’t be an issue. My girlfriend and I are on the same router and it still doesn’t work. When we both try to load into a game together it says “lost connection to host”. I hope this gets fixed soon because I can’t get a refund for the game.