I’ve been wanting to experiment with adding a comments section to posts and pages on my website for a while now. Rather than using one of those comments-as-a-service companies, I figured a lighter-weight solution would be re-using a social tool I’m already invested in: Mastodon.
I've been using https://utteranc.es/, same concept but using Github issues as comment. This is interesting, especially if there's a way to handle each user's instances.
For what it's worth: I self-host gitea, and it gives me the possibility to import not only repos but also issues, projects, etc from GitHub, gitlab, bit bucket, and a handful of others.
I don't know if Utterances can work with gitea's API. If it does, then in theory you should be able to migrate to gitea from GitHub for this use case.