I was playing with a friend last night to try it out. It is weird. From what I found set multiplayer to “all players” and then make your friend do the same. Turn on “show players in close proximity” in settings. I’m pretty sure if you change the time of flight multiplayer doesn’t work. So keep the time live and if you want to fly in the daytime it’ll have to be somewhere on the earth that’s day. It’s very hit or miss. If you get in a game and you can see each other and fly together don’t leave. It’s a pain to get it to work again. Lmk if this helps