Fortnite Stream Sniping?

Hello a friend of mine makes streams in fortnite and he plays on psn and me on pc i can join him in the same lobby if i start the round with him at the same time and he is on psn server but i can play pc on him then not stream sniping.

No, that does not work. Only when playing PS4 players with a PC player does one play in mixed lobbies, so to say PS4 and PC Lobby. Otherwise you play on the respective platform.

So I would have to do that with another guy playing ps4

Duu could also stream yourself 😅