Man pages matching name html::widgets::navmenu::expandval in section 3pm:

HTML::Widgets::NavMenu::ExpandVal.3pm.en	debian 10 / libhtml-widgets-navmenu-perl
HTML::Widgets::NavMenu::ExpandVal.3pm.en	debian 11 / libhtml-widgets-navmenu-perl
HTML::Widgets::NavMenu::ExpandVal.3pm.en	debian 12 / libhtml-widgets-navmenu-perl