Fortnite Ps4 lobby?

Is it possible to get into a ps4 lobby or a mobile phone lobby as a pc player?

Yes, but only if you are playing with a Ps4 / Mobile player

No, because if you think about it would be too unfair and then there would be no sense behind the pc, ps4 … Lobbies.

But if you play duo or squad with mobile phone, … Players, you can play against Pc player also a mobile phone or PS4 mate.