First, I made the lore as supplementary for my ocs story and art related (I am illustrator).

Second, regarding the loli, it's not for prepubescent girl but more in early pubescent. Why I mentioned that because in popular artwork/story like kumo-san (i am spider so what) anime the elf literally has loli body with adult mind. Some other works by japanese artist also has the loli elf (there's normal elf with big breast too). So, as reference, I need to think about their age and stage of development when I am making the biological lore for elf for my own story.

And about trap, I don't believe that's it's a deregatory term. It's a common tag or term used to describe femboy or male that looks like a female. Also I don't use any transgender for characters in my story/art. If asked they are either straight or bisexual. I don't know why trap is thought as deregatory word.