I’ve got a similar situation and would like to piggyback off of this thread, I found I was using Gamepass almost exclusively for Darktide and so I decided to simply buy it on Steam rather than pay for a subscription I wasn’t actually using and would like my characters moved over if possible
I’ve found a few posts 1 2 in my searches that imply they can’t or can only do so in limited capacity (can only move the character levels and currencies), though this might’ve changed in the last year since those were posted