Good on you Hajime, go live your best life!
Manga transwomen are always beautiful. No adam apple, no large shoulders or hands, no square jaw. Always pass flawlessly.
IRL many transwomen are beautiful. And some might not be. What's your point?
Just that. Manga almost always presents idealized transwomen and in this way minimizes the hardships they may endure because their body and appearance doesn't match their inner femininity. It makes it look like "passing" is just that easy.
It's always good to have representation and while, as you said, many transwomen are beautiful, for most of them I think it takes a lot of effort and frustration. The image of what's a "beautiful woman" in our societies has reached such impossible standards that even cis women struggle and get complexes because of them, so I can only imagine what a transwoman has to go through to be accepted and even accept herself.
Manga gloss over that part, because Japanese standard readership isn't interested in that. If someone is supposed to be a woman internally, they want her to look like a woman. Or then, they see them as "okamas", which are considered funny and ridiculous, not real "women" and the author can't make their point.
See the thing is, I've actually seen a few examples that don't fall into the "idealized, looks indistiguishable from any cis woman in the manga" version or the "transphobic stereotype that looks like someone's half-rememembered idea of buffalo-bill+a drag queen" and like.. IDK they still kind of felt off? They were giving the trans female characters subtle "masculine" features in a way that didn't feel like it was inspired by bad stereotypes sure, but those features were present in the trans female characters weren't necessarily present in any of the male characters. The fact of the matter is that for a lot of anime/manga character art-styles the only major differences between young men and women are breasts, haircut, and clothes. A lot of the other stuff that is used to distinguish character designs is highly variable (height, over-all body shape) stuff that doesn't have a direct analogy to real life physiology (the way that eyes are drawn, for example) or stuff that like a couple months of hrt or accomplished enough makeup skills would do away with.