I'm afab, but identify as agender. I have gone through many of the thoughts you've written here, especially if I'm even allowed to call myself trans when it's not exactly feasible for me to get bottom surgery. I'm also aroace, in a similar way that you are
Have you considered trying testosterone? At a lower dose you can still get some bottom growth. You'll also have some of the other changes like thicker body hair, and lowering of voice. I was on T for about four months and didn't have any voice changes, but still had enough growth that I was content. I can go into more detail if you like, and there's some toys out there (and functional prosthetics) that help alleviate some of the bottom dysphoria. There's definitely no right way to be Trans or NB but it helps to have some anecdotal info when you're feeling lost.