Wait can a male beta get pregnant?

As far as i know, no

no sadly

betas are like the hetero ppl in rl....what i mean is male betas can only impregnate female betas

Depends on the story. The author did draw Heesoo and Dojun's baby a few times before on her twitter and he's so cute. If she really wants him to have a baby, I'm sure she can make something happen. xD