Same issue here. I contacted EA online chat. they told me that they don't have the battle passes info on their ends and I should contact steam about it... 
I went into the steam page and this is what I saw there:
Unfortunately, Season 1 Battlefield Pro - Battlefield™ 6 and REDSEC does not utilize Steam to manage its items. You will need to contact their Support Team for any questions about your items in that game.