Simply none of that is accurate. The most prominent funder would be George Soros, but he's no transhumanist, and this seems just like an outgrowth of his support for left-liberal causes. There's also the Pritzkers - not transhumanists. In fact none of the billionaires you mentioned is a transhumanist.

One of your commentators brought up Peter Thiel, as the new boogeyman. But Thiel doesn't push trans stuff. He mainly doesn't care (the standard transhumanist position), and has opposed exactly one Republican bill because of its anti-gay elements.

You mentioned Rothblatt, but though trans and transhumanist, Rothblatt doesn't push the ideology. I haven't found anything about her wanting to go into women's bathrooms, have men compete in women's sports, transition kids or any of the nonsense you mention. She's much, much more interested in physical immortality and replacement organs. Standard transhumanist goals.

So, yeah. It isn't some sinister cabal of transhumanists pushing this. This is up there with conflating pedophile and paediatrician.