Here's a real study: https://pubmed.ncbi.nlm.nih.gov/29314190/ . It found when frogs were exposed to atrazine (a herbicide) in wastewater runoff, "female minnows were defeminized, whereas male frogs were feminized". Similarly https://www.pnas.org/doi/10.1073/pnas.0909519107 found that "Atrazine-exposed males were both demasculinized (chemically castrated) and completely feminized as adults. Ten percent of the exposed genetic males developed into functional females that copulated with unexposed males and produced viable eggs." So Atrazine can cause frogs to change their gender, and contaminates drinking waters in part of the US (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164008/), so it's not beyond the realm of possibility that it also influences gender expression in humans to some degree.
Egg temperature plays a definitive role in the sex of turtles, but no one would claim it in the realm of possibility for that to affect humans.
It's always good to be aware of how things affect human hormones and absolutely worth study and regulation, but it's a huge jump from frogs are affected to humans are affected. I know right wing people are world class long jumpers so this kind of "it could be!" really isn't helping towards a reasonable debate.
