no it can't
so when Iva asked about Luffy's Haki and Luffy showed same reaction it meant Luffy didn't used CoC on MF?
Kaido FELT CoC
therefore Zoro used CoC
I trust Kaido more than Zoro in this matter
When iva asked that, we saw luffy use xox at first
We saw the visuals and impact of CoC before people started talking
When zoro used CoC, No coc visual around
Kaido assumed zoro can use it but he isn't sure.
Nobody used CoC and we don't see visuals
Kaido can mistake Zoro's aura as cOC, we saw luffy mistake Cracker had CoC until he realised nah it isn't CoC
Oda left zoro having CoC ambiguous for a reason