Not after this chapter. Makes no sense he uses it then stops using it when the fight starts.
It also wouldn't make sense to not use ACoC to restore his energy.
Luffy was spamming ACoC against Kaido constantly. Then there's the fact that Kizaru had to block most punches and it would make a huge difference if Luffy used ACoC + no touch hits.
1.) They are harder to block due to the huge striking strength increase
2.) it makes it easier to hit the opponent with no touch Haki.
But honestly, it would already be enough if some character confirmed "See, they're using conquerors Haki!" to have it confirmed because no touch Haki doesn't automatically mean that every ACoC hits have to be no touch hits as well.