I like sourcehut. It's the only forge out there that isn't set out to copy the Github UI like everyone else. And its UI itself feels instantaneous, as if it was running locally.
Those are meant to be mentioned in the README. Each of sourcehut's parts including the repo frontend, project page, mailing list, task list, documentation pages, etc are independent. There is no predefined way in which these are associated with each other like on GitHub. For example, I use a single mailing list for all of my FOSS projects.