Let me repost this from the other thread yet again.
Sanji literally activates CoO, the heartbeat onomatopoeia, the panel darkening, and closing his eye to focus is clearly showing that he activated CoO. The same SFX as when Luffy uses his CoO against Katakuri.
The same SFX as Usopp uses his CoO down here.
Flampe stated that Luffy dodged her attack in a shock manner. Same thing happens with Sanji dodging Katakuri's jelly bean. And Luffy was using it unconsciously. Sanji was also caught off-guard at that point but he managed to dodged an attack from a YC1 with Future Sight.
And since Sanji's new CoO feat in the last chapter was so incredible, that only a blind admiral whose is God in CoO, and Enel using electromagnetic waves can replicate. Luffy and Jinbei can't hear the sound but Sanji can hear it clearly through the walls. So you can say that Sanji's CoO is on the same level as Fujitora's CoO who is an Navy Admiral and Enel who has the island level feat of CoO + his Devil Fruit.
Enel:
And now this chapter proves that Luffy still needs to work on his observation haki even more, whether it's a gag or not, it's still an impressive feat. I also think that Luffy has better precognition/time perception type than Sanji while I think that Sanji has better sensory type, something like Fujitora and Enel.
Oh and mind you, Sanji is the very first Strawhat to unlock Haki pre-timeskip in Little Garden arc.
Sanji also sensed Tashigi's tears back in Punk Hazard. Zoro tracking down small island CoO is impressive but pre-timeskip Sanji hears Nami from across the island. There you go.