Well I honestly don't think you can consider that as Gojo’s win in a domain clash, but even if you did I don't mind.
I have a question btw, where did the fans get this "Sukuna’s real CT" from? Cleave and dismantle are his ct, which is why his DE applies them as sure hits and we know DE is realizing your innate domain in real life, nobody has more than one innate domain. Furthermore, Yoruzo (a Heian era sorcerer) referred to Sukuna’s CT as the "shrine" and said that it related to slashes, Gojo also referred to Cleave and Dismantle CT as the "shrine" in this chapter, also Angel is watching the fight and hasn't even implied anything towards Sukuna having a different CT, saying that the Heian era sorcerers and even Gojo are mistaken by that is the biggest bs and headcanon I have ever seen in JJK after the Nobara coming to kill Sukuna with her soul damage attack
It all came from Sukuna's dialogue with Jogo when he used his flames, then he said he wouldn't cheat by revealing his CT, but even this doesn't confirm anything, It's just Sukuna saying that wouldn't cheat by using cleave again