Yeah, there's certainly not a lot going on over there discussing Abomination Vaults. There was some initial hype, but then it dropped off pretty quickly.The Paizo sub-forums for the APs are a wealth of info and advice on running them. At least during the PF1 era, the forums over at Paizo seemed to be on life support now (everybody on reddit, discord, etc..?). Anyways, I always made sure to frequent them while running an AP to get ideas to incorporate into my campaign and to look out for any potential pitfalls in the material. Its a time consuming task to make an AP sing, but its labor of love for me. I can see it being a chore for others.
There's certainly nothing like what we see for WotC Mega-Adventures. There are multiple YouTube channels that pick apart each chapter, DMs Guild content to expand every one of the storylines, bloggers who give all kinds of advice, etc.
PF2 has this assumption that a GM obviously already understands everything. There's really nothing out there to help run the game, and Paizo is focused on just making it more complex. The YouTubers I have watched are basically reactionary trying to defend the design of PF2.
Aside from Paizo itself, there's a desert of content for PF2 (not just 3PP, actual discussion of the system and its products).