If you play Fortnite on the Nintendo Switch with PS4 friends, could you come into the server against PC players?

I play Fortnite on the Nintendo Switch and mostly play with friends who own a PS4. My question is now whether my group could come through the fact that crossplay between Nintendo Switch and PS4 in a server in which we would have to play against PC players?

I would appreciate an answer very much.

That's clear

Only if you set it manually. Controller players are among themselves. But let's go to the PC-Server ^^ that will be funny.

Thank you for your answer. Can you maybe say how to stop that?

Only if you have PlayStation / PC players in the team (at least I know that)