Man pages matching name wtimeout in section 3ncurses:

wtimeout.3ncurses.en	debian 10 / ncurses-doc
wtimeout.3ncurses.en	debian 11 / ncurses-doc
wtimeout.3ncurses.en	debian 12 / ncurses-doc
wtimeout.3ncurses.en	debian 13 / ncurses-doc