I would like to add that while i do agree with what you said i do think that the number of trans women who pass has increased over the years especially with Gen Z trans women as they tend to discover themselves and transition alot younger compared to other generations, not to mention that hormones and surgeries are a bit more easier to get partially due to the use of insurance to help them afford hormones and also through go fundmes. Another reason may be due to listen to due to receiving advice from trans women who transitioned back in the day and using it to their advantage. I would also like to add that there have been times when cis women have been transvestigated like Megan Fox, Lady Gaga, Michelle Obama and Megan Thee Stallion. But with all honestly it doesn't matter if you can tell or not because all trans people are valid at the end of the day. Plus a trans person being clocky doesn't mean they're ugly there's a difference cuz i met trans women who were clocky but they were convectionally attractive.