yea, pretty much! i can talk more about angel's secondary sexual characteristics if that will help!

anyway, angels who were amab might have some more demon-like characteristics (like small horns and tails, more body hair, esp on the ankles and shorteted toes/feet). their clits will probably be a bit bigger, and can even look like a small demon cock (with spikes and all)

those are not hard rules obviously, sol fits the amab criteria and he only has the markings (which is actually the >only< criteria when assigning sex to babies), bigger clit and extremely tiny horns (they're under his bangs, usually)

hrt would make a transfem angel grow boobs, but, if she has either horns or a tail it will cause them to shrink slightly as well. they can also be permanently removed by cuttings them off repeatedly while on hrt (with anesthesia if they're not a pet, likely without if they are), because they'll grow smaller each time ^^. it also affects their clit size similarly.

this would also work in reverse for a transmasc angel as long as they have the appendage to begin with. like, if you have horns hrt will make them bigger but it won't make one grow when theres none. also there is an individual limit to how much appendages can grow

theres also non-hrt methods to change their bodies. like removal surgery, but because of angel's regen powers, for it to work, the wound must be sealed with iron for at least 10yrs. adding things is a bit simpler, but the implants must also be iron (or coated in it) or their body will expel it.

although angels do assing sex at birth its not seen as too big of a deal to just not vibe with it and change it later in life. you can even do it while still in draft age (or before). that means transphobia isn't really a thing in inferna.

feel free to use as much or as little of this info you want! i made inferna to be a fun toybox so i could play around with gender/sex myself but if you dont like any of those "rules" you can feel free to ignore them, the most important thing to me is that ppl get to have fun as well, sticking to 'canon" is completely optional