Probably some of them.

I usually don't mind it when transmasc or fem fiction doesn't have any other sorts of trans character, just like I don't mind when feminist fiction focuses primarily on women. My issue with the tensorate books is that it isn't really marketed as a specifically transmasc series and so much of it is about how the setting's society interacts with gender and yet we never get an example of how that works in the other direction. There's plenty of exploration of transmasc and non-binary identities, even some detrans/repressor characters, but absolutely no transfem character. I didn't want it to be something major but there couldn't have at least been a single transfem minor character? Every single woman in the novellas is either all-but stated to be or heavily coded as cis.