Man pages matching name xfce4-power-manager in section 1:

xfce4-power-manager.1.en	debian 10 / xfce4-power-manager-data
xfce4-power-manager.1.en	debian 11 / xfce4-power-manager-data
xfce4-power-manager.1.en	debian 12 / xfce4-power-manager-data