Neovim and vim both support different APIs for something similar that seems like it isn't quite as useful as Emacs version for this use case. Vim has textprops and Neovim has extmarks, and while you could implement something that made these read-only, it doesn't seem like there is just an option to make it so. Both features seem mostly designed to support virtual text / compiler diagnostics, rather than enabling Magit-style interfaces.

I would love to see more buffer-centric interfaces in vim (fugitive, oil) and less popup-centric interfaces (lazy, mason).