I absolutely hope that someone can provide a more thorough answer and don't want to discourage such an endeavor; however, u/commiespaceinvader discusses the historiography of the Nazi persecution of homosexuals in Nazi occupied Europe here. It explains some of why there is a lack of sourcing.

I searched for some evidence of this same question a few years ago in this thread, but with little luck.

u/commiespaceinvader was more successful here.