Man pages matching name irqtop in section 1:

irqtop.1.en	debian 10 / irqtop
irqtop.1.en	debian 11 / irqtop
irqtop.1.de	debian 11 / manpages-de
irqtop.1.en	debian 12 / irqtop
irqtop.1.de	debian 12 / manpages-de
irqtop.1.uk	debian 12 / manpages-uk