I tried to report to #GitHub that their social links feature fails to correctly validate #fediverse handles unless they are hosted on a mastodon, and all I got was a link to their community discussions 🙄.
Since Microsoft is big enough to only care about things when there is enough noise, here is a link where you can upvote / make noise. :nes_fire:
Until this is addressed, if you happen to be using any other server type (e.g. #Pleroma, #Akkoma, #Calckey, #Friendica etc), GitHub will not accept your handle as a fediverse social link.
