I'm sorry what exactly has changed since then, on a systemic level?

Yeah the US trying to pinkwash their war efforts has certainly made the situation for LGBTQ people more difficult, but that's not a phenomenon unique to Iran. It's the same in Russia, large parts of Africa, West asia and I think latin america as well. If the nation hostile to you (like e.g. bombing schools while they're in session) is also loudly proclaiming they want more gay rights, the knee-jerk reaction is that this must be a hostile act aimed at dismantling your society as well. That's one of the ways how capitalists divide society into different identities and pit them against eachother.