How do I report / help fix formatting issues?

There's a post I'm viewing on the larger lemmy-verse that's failing some basic markdown formatting. I know nothing about the history, but searching didn't really give an answer (Not that I'm much good searching the fediverse), but I'd be happy to help update/add to the formatting system if I knew where it was :D The source of the thread is from here on a link to selfhosted@lemmy.world, and in-thread I've posted screenshots of how I see it...