Switch Crossplay

My sister and I were trying to make an Ark crossplay world, but couldn't get it to work. I created a non-dedicated session, and it would not show up for her under "Join Ark". (And yes, it was filtered correctly). My sister has a switch, and I have a PC. There, I was using Ark downloaded from Microsoft, but I have the steam version as well. Is there crossplay for switch and PC, on either Steam or Microsoft, or were we doing something else wrong?