This thread seems a bit mad but I wanted to try and answer the OP- although I must say I have few hard figures OP, so maybe you won't find my answer helpful.
I think the first thing to note is the figures I do know are that whereas once 18Mn people watched an episode of EastEnders, today I think a few million is considered really good. TV viewing is very fractured.
Anecdotally, I know loads of people who like Drag Race, both those I would have expected (gay male friends, female friends who love shows about dressing up) and those I wouldn't (friends from Church, Rugby friends of DH). I'd be surprised if it didn't draw in at a least a middling to good audience. It is on Netflix too if that helps. A very random internet site (Parrot analytics) says it has 10.5 times the average viewers for its timeslot.
No-one I know has mentioned watching What it Feels Like for a Girl tbh. It's on BBC 3 though, which I always thought had a remit to take risks.
On the Netflix side Sex Education has trans characters, quite a few people I know like that show and from what I can find online viewing figures have been high- 97.6 million viewing hours in the first month. Heartstopper also has a trans character, viewing figures seem to have been more modest according to Google, but it's popular enough for continued renewal.
I know they've been very controversial on FWR but I don't really see Rose from pottery throwdown as a casted character really- they just shove the stuff in the kilns, and have the odd cameo about the firing process, I don't see that their gender matters at all. The characters are more the contestants surely?