Did King use Conqueror’s Haki against Zoro? I don’t really know what this page is meant to show, otherwise.
The focus seems to be on that the two aren’t touching, we’ve got bits of the lightning and the sfx is one that’s often used for Conqueror’s Haki clashes, it‘s slihlty different from the usual “don” sfx.
I think it looks like he did, but it’s strange that there’s absolutely no acknowledgement. Could have had some of the fodder around to get knocked out. But again, if it’s not Conqueror’s Haki, I don’t know what is meant to be happening here.
Might need some secondary sources to confirm, be that Vivre Cards, the anime, SBS, whatever.
*by Garp the Fist