Dark Ranger Unlock with boosted character

Hey all! Looking for some advice as I’ve officially found nothing online.

I pretty much skipped Shadowlands (got like 1/3 into Bastion, realized I was kind of hating it and just never went back) but came back to Dragonflight when they were offering a free level 60 boost.

I wanted to unlock the dark ranger customizations and was surprised to see that it looks like the shadowlands zones are all unlocked for me (thought I might have to progress through them), but I can’t find where to start the quest anywhere. I’ve seen the location online and no one seems to be there. I’ve also seen people saying you need to choose a covenant to get it to show up, but I’m not sure how to go about that either.

Anyone have any ideas?

Thanks so much!