you can read “dumber” books, but the internet literally responds to you.

thanks! this didn’t solved my specific problem but caused another problem for me (e.g. _M_A_N(1)), but while searching about MANROFFOPT I came across a reddit post I had somehow missed when searching for a solution, and it it the actual solution was mentioned. what worked for me is export MANPAGER='nvim +Man!' instead.