Hmmm... We haven't heard much about betas in this story, but generally betas are like ordinary people.
Beta men cannot get pregnant
Betas can get pregnant like normal people. Pairing up. Man-Woman. I believe Omegas can make others pregnant too. Like of it was Omega (Male) and Omega (Female) but their heat cycles would just be a bitch
I think it depends on the author. I read some omegaverse manga where the beta can get pregnant, but mostly in other manga the beta can't get pregnant
Do betas get pregnant? And do omegas can make other peeps pregnant?