That is a fairly new resource that Muse (now the owners of Audacity) are developing. It is not complete yet, basically it will take over from both the Audacity Wiki (which will be retired/deprecated) and most of the Audacity Manual, the Manual may remain as a pure reference manual with no how-tos or tutorials (the front page og the alpha test manual as already been split to reflect that and help facilitate the transition,
Muse also run a Discord support channel:
Plus there is their GitHub issues log for bug tracking:
As I just said in my new post in the clicks thread, if I can’t sort out those horrible clicks which take up a huge amount of my time to fix, and some still can’t be fixed - I will have to ditch the Audacity and buy another DAW.