MVC is now part of the AspNetWebStack, and not a separate repo. very little has changed in the last 7 years. See code changes:
https://github.com/aspnet/AspNetWebStack/releases
Note: the library is pretty mature, no updates in a couple years. The 3.2.5 release had the most MVC changes back in 2018. you can also check the issues for any possible pending work.