Hello,
why are you still use SVN for the development and not git?
Trac does support Git: https://trac.edgewall.org/wiki/TracGit
Related: https://www.zdnet.com/article/github-starts-blocking-developers-in-countries-facing-us-trade-sanctions/
However it's not GitHub itself to blame here, but US government.
IIRC we ourselves have a team member from Iran.