Is this some kind of omegaverse

Ofcos it's omegaverse. They have a child together.

no, it's not omegaverse. There is no alpha, pheromones, marks etc. The uke just have that "special" body. Typical Chinese novel troupes

I neither agree nor disagree with you. But I just want to correct you, the woman he lives with is a dude, who likes to dress as a woman.