That is true, but AGP still existed back then, even if there wasn't a name for it back then. I'm sure most stayed in the closet or only dressed up privately at home, but I'm sure there are some who are featured in these pictures, but because of the requirement in that period was that you had to appear convincingly as a woman. so they blended in with the HSTSs.
There are pictures of Nazi officers dressed in lingerie and other women's clothing. And pretty sure if you're a Nazi officer, you're going to be a straight male. When straight men dress up in women's clothing, unless they're doing it for an acting role or as a costume, they are doing it for purely sexual reasons. Whether they transition or not, whether they realize it's a sexual fetish or delude themselves into trying to actually become a woman, it is purely for sexual reasons.
Even if back when HSTSs were the majority, there were definitely some APGs among them. Again, before AGP had become named and documented, there was obviously enough men with symptoms of this paraphilia that they learned to distinguish it from effeminate men with dysphoria, to straight men who had no dysphoria, but a sexual desire.
And this is one reason I hate why feminists are fucking blamed for this troon shit. Male doctors like Blanchard were the ones who stated that even though they have a sexual paraphilia, have no dysphoria, we should still allow AGPs to transition. And this shit was pretty much kept hidden from the general public, while the image of HSTSs was pushed so society thought trannies were essentially harmless, and also thought there was stringent requirements and gatekeeping for allowing a male to transition into a woman.
I do believe that AGP used to be extremely rare, but unfortunately, if you read about crimes in history, you can spot AGP tendencies, though because psychology was not a thing, it was just assumed these people were insane and they were either killed or thrown into prison/insane asylum.