There has been quality research published recently on treating gender dysphoria. For instance, A 2020 study on treating GD with hormone therapy:
https://www.tandfonline.com/doi/full/10.1080/08039488.2019.1...Somewhat unique among studies on pediatric gender affirming hormone therapy, this study had a control group that wasn't prescribed blockers. The group on blockers fared no better than the control group. This is the study that primarily motivated Finland to stop routine prescription of puberty blockers to children, with half a dozen or so other European countries following suit after their reviews of the evidence.
Researchers in the US have typically balked at the idea of including a control group in their studies on blockers, arguing that it's unethical to withhold live-saving medicine from patients. This, conveniently, lets authors frame null results as positive, by claiming that gender dysphoria patient would have fared even worse without blockers. This is what Johanna Olson-Kennedy did in her latest study: she observed no change in the patients' outcomes, and claimed that this indicates that blockers are beneficial because they prevented the patients from getting even worse. But without a control group in her study, this is statement is just speculation.
The retreat from gender affirming care is motivated by the absence of good evidence in favor of their usage. And it's hardly a US-specific phenomenon. It's uniquely politicized in the US, I'll grant that, but this shift in stance on altering children's endocrine systems is happening in plenty of other countries too, so I'm not so convinced this is solely borne out by this latest President.
And again, I find the attempts to equate anti-gay conversion therapy aimed at suppressing homosexual desire with exploring ways to become more comfortable in one's natural body. It's fundamentally different to[ tell a boy attracted to other boys that his feelings are wrong than it is to tell a boy identifying as a girl on account of his same sex attractions, "boys can like other boys, not only girls can like boys". The former is telling someone to reject a part of themselves, the latter is expanding's one's concept of gender to include one's natural state of being.