Before you ask, here's how :)
https://www.emacswiki.org/emacs/tmux_for_collaborative_editi...
https://www.emacswiki.org/emacs/tmux_for_collaborative_editi...
In addition, you can start a Live Share session, share a terminal, and then use Vim/tmux/etc. from there. A bit of overkill, but still kind of cool :)