Well the 2.1 only has night 1 and the first part of night 2 so i don't think 2.1 will be uploaded here on itch, as for the 2.2 update when it will be uploaded here well from what i heard from fatal fire they are revamping the arcade mode completely with the new night guard and maybe adding some new places to explore.
Now when will we see the 2.2 update here on itch well it depends how long it will take them the finish 2.3 update with the new arcade mode i can only guess but we should see it around January or February but as i said it just a guess so take it with a grain of salt.