Anyone has suggestions for hosting open source hobby projects managed with Mercurial.

Loved Bitbucket's Mercurial offering. Looking for a replacement.

Sourcehut has Mercurial support: https://hg.sr.ht/

Heptapod is a GitLab fork that adds Mercurial support: https://heptapod.net/, free for open source projects: https://foss.heptapod.net/heptapod/foss.heptapod.net

Just in time. I was about to edit my own comment to mention

https://hg.sr.ht/ that I learned of from a comment by frabcus on this post.

Thanks for links.