I'm kinda curious how one can be 'half omega'. Looking forward to this being explained.

I think it only means that one of his parents is an omega and the other is not.

I kinda get the feeling that he just thinks of himself as a half omega because he doesn't look like the typical omega and never produced pheromones/went into heat.

sounds kinda like a sub-beta thing but in the end he turned out to be a late bloomer

Well, he has 2 genders, omega and male. Other mangas don’t really phrase it as “half male” or “half omega” but that could be the case.

Half omega bc he just has some of the same features as an “typical” omega. He doesn’t/didn’t went into heat, doesn’t look like a omega...one would call it a “defective” omega maybe? but that sounds too harsh, so half omega is a better term for it idk

I would actually think one would call it glorious omega, especially since most omegas who go into heat are often raped