https://www.pcgamer.com/sony-finally-allows-fortnite-cross-play-between-ps4-pc-xbox-and-switch/

Earlier this summer, Fortnite players discovered that if they played the game on a PS4, they couldn't use the same Epic account on a Switch. And then they got very mad, and we learned that once again Sony was blocking cross-play with its console competitors, which as Steven said a couple weeks ago, hurts PC players, too. All the peer pressure seems to have worked, though, as Sony has finally changed its mind.

An open beta starting today will allow PS4 players to play with users on Android, iOS, Nintendo Switch, Xbox One, PC, and Mac, as well as enable cross-platform progression, so they can take their account between PC, Switch, and PS4 if they want.