Not every trans person really cares about transhumanism just like not every Christian thinks we're of "the mark of the beast". The trans community is a very diverse group just like any other group. You'd think there'd also be more blind and deaf in the transhumanist community but so far I'm the only deaf transhumanist that I'm aware of. Shrug
Tell you what though, why don't YOU reach out to the trans community? :) I always say, be the change you want to see. I try my best to reach out and advocate for the deaf, you can do the same with trans and we'll tackle our respective groups in bringing them into the fold.
Also you can work with @KittyHPlus if she feels up to working with you. You both are trans and transhumanist. Just don't butt heads. ;) Again, not everyone in a community agrees with each other, so be nice and focus on what you have in common and set aside the differences.
RE: There should be more 'Trans' in Transhumanism