In some omegaverse it is hard to get pregnant with the right conditions. Like at the end of last season. He probably did not get pregnant because he was not in heat and he may only get pregnant if his is knotted and in heat.
I read this a few months ago, and this is one of the best underrated BL I ever readI came back just to read the divorce and remarriage as a same sex marriage
Shot reading all these spoilers makes me so excited for the future chapter