Enma didn't do shit lol.
Zoro went all out giving it all the ryou and in the process unlocked AdCoC.
So why didn't he unlock it any time before?
Why didn't he unlock coc when he was training with mihawk? Surely he had to go all out and give it his all?
Why did he only unlock it in wano against king?
What was the difference?
I'll tell you. He didn't have enma yet to suck it out of him.
Oden had CoC back then not adcoc. Lol.
Headcanon again
Literally nothing you said means jack shit. 8 year old lolden was able to easily tame enma. Meaning he had enough coa to appease enma. So enma had no reason to suck out oden's coc to appease itself.
Zolo on the other hand, doesn't have coa on the level of lolden, cause lolden is a gary stu. And so, enma sucked out his coc and unlocked acoc for him. Teaching him how.
Flow of Haki is Ryou genius
And what is acoc genius?
Flow of coc...
Enma took the coc inside zolo and flowed it out as acoc. Allowing him to use acoc and learn how to use it.
without enma, he doesn't get acoc.