As you can see with the recent Ifrit Jambe is blue reveal. Zoro fans are obssessing over it and claiming that Zoro has already used Blue Flames. What they however dont understand....is that he hasnt. And that Wano has literally answered what has happened.
First proof....theres literally no fucking flames on Zoro's sword.
Secondly....the flame...isnt like normal flames. Its more akin to Ryou
My opinion is that its Ryuma Ryou. With his warrior soul leaving his body. Or something along those lines.
Either way latching onto Sanji's feats isnt cool. Especially when the flames arent even his feat lol.