I believe I’ve bugged myself out of the mount quest.
I’m level 32 and am on the first quest of Act IV and the mount quest has not become available. I was questing with friends in Act 1 and accidentally skipped the last quest before act II because I had to go afk. I then hopped back in with my friends who were one quest ahead of me in act 2. I finished all of act 2 and 3 with them, and then I went back and finished act 1 solo. After finishing the last quest of act 1, I’m officially on the Act IV quest Prying the Eye, but the mount quest is not unlocked.
Maybe there’s another requirement I’m missing?