
Omegaverse varies a great deal, but the ones that even bring up female alphas do state that they have dicks too. There is one omegaverse where the main character's parents are a lesbian couple with several kids. Wish I could remember which one it was, but the parents were background characters anyway.

Sex Pistols is a good one, but that's actually pre-omegaverse. This was an actual omegaverse one. It may have been the one where the Omega thought he had been hired out as a maid to the Alpha's family, but was actually sent to take part in a competition to become the Alpha's bride. It's driving me nuts because I saw it the other day as I was sorting through the omegaverse tag, but I can't remember the name and that tag is 56 pages long and half of it is non-omegaverse that someone tagged as omegaverse.
Interestingly enough Sex Pistols is one of several m-preg series that was around long before omegaverse that is now getting incorrectly tagged as omegaverse presumably by people who are new to the genre. All m-preg is not omegaverse, and omegaverse has some very specific differences that are not seen in traditional m-preg (ex. Alphas, heats, fated pairs, etc).

I found it! I think...? Took me 86 pages and a real hard look at my life choices but here ya go! If it's not the right one, let me know!
http://www.mangago.zone/read-manga/kasegimasen_kara/
Hmmm. I am hoping for the season 3 that the main character is their sister story hehe!(▰˘◡˘▰)