I have noticed they are using he/him more frequently this season. All this talk made be curious and I rewatched the episode with Mo’s church and the pastor described Mo as genderfluid. There was also the episode where Simon meets Mo and he asks Zoey directly about Mo’s gender identity.
Simon: Your boy Mo’s going to be great at the SPRQ Point party. But, he is a boy, right?
Zoey: He doesn’t believe in labels.