Does anybody know if these sites are being actively maintained? Not sure how long its taken previously for new Revit API to be added but 2025 SDK has been available for about 4 months now.
actively, no
Gui Talarico has been setting all this up
but Gui is not very responsive. I nudged him 4 months ago and never got any reply
you may want to nudge him through https://gtalarico.com/ and raise an issue here maybe Issues · gtalarico/revitapidocs · GitHub (So that I don’t feel like a PIA reminding him every year 
)
I made a PR 2 years ago I think to add more repo for the sample part of the apidocs.co website but it was never processed.