What did DJ heat up, Queen didn't have any burning marks, chuji and the prostitute were at arms length and never said anything about being hot, the paper doors and walls burned from King's fire.
As for Queen, Sanji said himself that it's tough damaging Queen (before IJ). Just because Oda didn't draw Queen with burning marks, it doesn't mean DJ didn't heat things up. Can't cherry pick an example.
As for Chuji & Osome, why would Oda waste a panel showing them commenting on it, the readers already know about Sanji's condition, it would be redundant. Sanji has no ranged attacks, so his kicks must connect before someone felt the temp of his legs.
Besides it would mean his fire affecting a woman, something oda and Sanji wouldn't show.