Context:
People have been asking for IPv6 Support on GitHub since years (probably a decade by now)
... and someone even got so annoyed that they decided to setup a dedicated website for checking this: https://isgithubipv6.live/
While you may have IPv6 it doesn’t do anything if the services you utilize don’t support it.
MANY major websites and domains have no IPv6 support. https://whynoipv6.com/