Can Ghouls be damaged by fire?
I think there never was that kind of interaction, beside

 when Tatara and Takizawa fought in Tokyo Ghoul:Re 2nd Season episode 3, but i dont know if that counted as fire. + Takizawa is kinda sadistic so im not really sure if his screams of pain weren't just sarcastic since he follows that with: &quot;but that felt really good&quot;

(I would love to provide more to that scene, but im not that familiar if it is possible to tag pictures as spoilers so i hope that the episode is enough as source)