My entire comment didn't get posted. But also the author recently made a post about a baby photo and she confirms it's not apart of the main story, it's basically fanart for the S2 Q&A. So I don't think there's gonna be pregnancy in it. Again, it would be a lot to cram into S3. So I think you're safe since mpreg bothers you.
A manga/manhwa can be omegaverse and not have mpreg in it. I think most omegaverse do though. I haven't read a lot of omegaverse, but there was one I have read where mpreg was not included. And we don't know for absolute certainty that there will be a baby in S3. A lot of people thought there was gonna be one after the baby pic, but the author confirmed that was just fan art and not apart of the story. I don't think anyone can say there is or isn't with 100% certainty. We can give our thoughts about what makes us think there will or won't be, but that's about it.

I know it's omega verse but is there Mpreg in this? It's just something I'm not into so I always ask when omega verse is involved.