Man pages matching name mtrace in section 3:

mtrace.3.en	debian 10 / manpages-dev
mtrace.3.es	debian 10 / manpages-es
mtrace.3.en	debian 11 / manpages-dev
mtrace.3.fr	debian 11 / manpages-fr-dev
mtrace.3.en	debian 12 / manpages-dev
mtrace.3.fr	debian 12 / manpages-fr-dev
mtrace.3.ru	debian 12 / manpages-ru-dev