As others said, “First Target” is adding enough to push the numbers.
From my limited testing, Hammers don’t cleave that great so it’s probably a good stat anyway and actually indicative of damage you’d do for what you use it for.
Also worth noting that Penetration factors greatly for different armour types.
Hit V to go to the inspect screen then hit tab.
It’ll show you the damage per enemy hit by attack type and you can also see the stagger value in blue.
I’m not sure if we know mass values of enemies to know what that stagger value would mean, but… it’s still useful info. Although a little hidden and obscured.
I complained about stat presentation here: Weapon Stat Clarity - Mobility
Although I wrote that at 1am and it’s not exactly coherent, I stand by it being a presentation issue with the stats we see being as useful a metric to look at as the magnification of a telescope is in working out the mass of a star it’s looking at. It’s a start, but it’s not the info we want to know at a glance.