That might be it. I just bought the pass and everything I had found by googling implied that he would just have the loyalty quest as soon as I logged in. I'll get on that tonight, thanks

Have you finished your initial quest to play Gambit Prime?

Yea you need to finish a prime bounty. I still haven’t done one, or even won a match of gambit prime

Like the other guy said, you need to finish the initial quest that has you play Gambit Prime and The Reckoning. This essentially "unlocks" the dlc, including the Allegiance quest.

Tried searching but none of the posts that came up mentioned it. Just bought the annual pass after switching to PC and the Drifter hasn't given me the pendant option at any point that I've spoken to him

Was the Drifter vs Vanguard choice only for one day or something?