Are there other code hosting platforms besides Github that are not based in the US or upon which US Government sanctions have little to no influence?
Back to India!
SourceForge!
No,
you host your own Git server (Gitea). That is what I and many others did when Hollywood came knocking on youtube-dl's door.
As far as Bitcoin the currency is concerned, it's not a mixer or a "laundromat", so it has nothing to fear. Even in a hypothetical situation, we can fight back, print shirts and all kinds of stuff with Bitcoin Core source code on it, just like the 90's cypherpunks fought back for PGP.