Doesn't Kaido literally ask Zoro, immediately after being cut, if he has CoC? How would he know this if it's not the literal attack he just performed on him?
That's not my point
If zoro used coc, Oda would show visuals and clarify it in sbs or even tell editors to write it in VC
We saw thicker coc sparks when Oden attacked kaido while Ashura had no coc visuals .
Oda goes in sbs to state Oden and Roger used adcoc on their attacks but not Zoro
Even vivrecard only talks about zoro general haki being boosted by enma and ashura being strong to scar Kaido
Guys relax, Zoro CoC moment is incoming