I'd call myself somewhat of an omegaverse veteran so I'm try to answer these.
Almost all omegaverse are different, it depends on the author on how they want to build their omegaverse universe.
1. In a lot of alpha females, they're either futa or their cl*t grows into a penis. Again in some omegaverse that doesn't exist, and in other it does. In some fxf or female on male pregnancy is possible but in some not.
In some female alphas have only sperm and no egg and in some they have both, or neither.
2. No. Why? Because even irl its not possible and omegaverse doesn't take that high of a reach. Plus a lot of omegas in omegaverse dont have sperm that can fertilize.
3. Once again no, same answer as above.
4. Depends on the omegaverse once again, some male omegas dont have sperm and some female alphas dont have eggs so i would say no.
5. Yes. Homophobia and secondary gender sexism is heavy in most omegaverse. While some still have the sexism, they dont have the homophobia. Because in most omegaverse secondary gender > actual gender. Though this has not been explored much in omegaverse, there are some straight alphas they will seek out females, or a gay alpha that will seek out men, though usually thats not the case.
6. Again depends on manga but i urge you to look up "male omega anatomy" on google and look at the image yourself because its too hard to explain.
I was gonna try answering these but seeing user Mia's answers, yep, that would be the same for me. I totally agree with Mia's answers bcs Omegaverse trope is not a one-size-fits-all. It would depend on the world building of the creator (author or artist).
So let me skip #1-5 and try to answer #6.
Just wanted to point out that "giving birth" is an outward act, so I'll take it as, you are asking for the "exit" points. And it seems you mean it in terms of a natural birth, not c-section. Because some stories do not give omegas that "exit" point for their baby so there's no other choice but to undergo c-section (for instance, Unromantic).
It's rarely depicted in licensed manhwa/hua/ga. There will always that blanket or cropped panel during labor. So we can't know for sure, unless we can just assume that the entry and exit point is the same. But if you are curious to see an explicit content showing how pregnant omegas (or even non-omegas but got mpreg'd) give birth and get the answer yourself, you could explore this list: https://www.mangago.zone/home/mangalist/2794863/
I wasn't really trying to get a serious response , though thank you for answering. I was trying to get the "wrong answers" or like have someone talk about these in their own fantasy.
I already know the answer to these. I just want to know what others think in their own fantasy, not what is set by authors.
Answer these if you dare...
1. If male omegas have uterus, does that mean female alphas have balls (testicles)?
(Do they have both the sperm cell and egg cell?)
2.Since male omegas can ejaculate, can they impregnate themselves?
3. If male omegas have balls and a dick, does that mean female alphas have vagina? If so, can they impregnate themselves?
4. If you answer yes, then can a male omega impregnate a female alpha?
5. Will homophobia even exist? Will sexuality be based upon one's secondary gender?
6. How do male omegas give birth? Do they have 2 entry points in their anus?