If you can't find any public rooms in the lobby of We Were Here Expeditions: The FriendShip, or if you are unable to join someone's room, please read the information below which provides a possible fix for this.
Keep in mind that it could be that nobody is hosting an open lobby at the time you're searching. You can always look for a partner in our Discord server or wait for the busier hours (usually in the evenings or weekends) to have more chances of finding a partner.
If you have trouble joining someone's room, try to directly invite the other player from your friend list instead of manually searching for the room.
Make sure your PC's Firewall is not blocking the game or that your console has all relevant multiplayer settings enabled and an online subscription to be able to play with others online.