No some omegaverses the alpha will get morning sickness,etc even though it's the omega that's pregnant.
It's not just something that happens in omegaverse. It could actually happen in real life were the partner will get symptoms even though they are not the one who is pregnant. It's kinda rare but it is possible.
Oh, I know. I'm actually a parent myself and when reading parenting guides while pregnant, I learned not just this fact, but men can even lactate when their wives are pregnant. It's nuts but kinda awesome how the human body works!
I just finished Blood Link where that happened with Hwa and Hyun. What an adorable story too, I cried so much
I think they're both pregante.