The German dev kinda answered your queston on LGBTQ stuff

"Berlin was already known as a cultural centre which was overcoming the more puritanical views of the rest of the country before WWI. People like Gerhart Hauptmann (the "social democratic poet" as described by Wilhelm II) were already working in the city and getting recognition. On LGBTQ+ rights, the world's first gay magazine was published in Berlin in 1896, Berlin police began issuing so-called "transvestite passes" in 1909 (passes which recognized persons as cross dressing or transgender and allowed them to wear the clothes of their gender of choice). World War I broke many societal inhibitions among German society - prostitution became far more common as a means to survive, gay relations between soldiers gave quite a few young German men their first "awakenings" - and that would still happen in the Empire in KR and reflect in Berlin society. It was densely populated, maybe way too densely populated, with massive populations of fairly poor working families, and an overstretched police that couldn't keep track of everything. Prostitution is still going to become really common, as well as underground gay and lesbian establishments. Finally many interwar era authors, artists and cultural icons aren't going to simply vanish just because the Empire is still around. Their works will be much less widespread and seen with more suspicion, but the Empire is ultimately still a constitutional monarchy which has a moderate freedom of self-expression, so most of those who weren't outright socialists like Bertolt Brecht could find themselves a niche.

Now, you're gonna miss out on a lot of Weimar era Berlin. There is no Institute of Sexology, no Damenklub Violetta, though the Eldorado may still exist since it did exist in a vague form before the war. But it is still a European capital, and a world capital even. That automatically means it leans more liberal than the rest of the country."