You don’t understand - there is no need to setup backups. Every user has a full “backup” of the repository (unless using sparse checkouts or other niche configs).
Re:GitHub is fully available in Iran
by prepperdev on Tuesday January 05, 2021 @10:51PM
(#25654494)
It really depends on how small or large your organization is.
If it's a single repo with a single branch, sure. No need for explicit backups.
If it's tens of repos with multiple important branches in each, then it would be very dangerous to assume that developer machines have all of them.
It's not advised for these Iranian developers to use any Github-specific features, such as issues, wiki, CI, because losing them will cause disruption / knowledge loss.
And then the reason to use Github specifically, instead of something else is quite low.