Huh? Boy Love movies are incredibly popular in China. Mostly by women for some reason.
https://dearstraightpeople.com/2022/08/17/top-chinese-bl-dramas/
They can't do overtly sexual things, but having to romantic male leads is a hugely popular genre in China.
*Edit: Here's an even bigger list
That's the craziest thing about Chinese censorship. They actually censor far less than anyone is aware of. However because they're not transparent about the why, people just start assuming. The wildest part is this is all part of the plan. They want everyone to think the government is overly sensitive so people will start self censoring and the government doesn't have to lift a finger.
So why that show got censored? Who knows.
*Edit: And while what I wrote sounds dystopian, and in many ways it is so I won't go further into how it hurts some people, but it also creates a strange benefit for it's citizens. You know how USA has internet trolls that run around creating havoc? The internet trolls in China all bind together to defend China. Because they think the censorship is in THEIR favor. Let me give you an example. Dolce and Gabbana made what was considered a racist video in China. China itself said nothing about it. The people however, convinced this is something China should censor started massive internet campaigns. Ultimately leading to a gigantic boycott that still affects Dolce and Gabbana to this day. The strange self censorship has in many ways become a badge of pride for many Chinese people.