Chawan is a TUI web browser, which comes with support for man pages (mancha):
Install it here: https://git.sr.ht/~bptato/chawan
You’ll need a nim compiler.
I use mancha as my normal man command.
My config file is at ~/.config/chawan/config.toml, and has this.
[page]
'n' = 'cmd.pager.nextBuffer'
'b' = 'cmd.pager.prevBuffer'