The messaging leading up to the election was all about DEI. Who decided to add the A to it too? Complaining about accessibility wasn't on the mind of any Trump voters that I know.
First, DEI became DEIA under Biden, see the executive order [1] (now worryingly removed from the site). That had some logic as a mission creep which is always welcomed by the bureaucrats.
Second, when the Trump decided to dismantle DEI, keeping "DEIA" didn't make sense, and surgically removing DEI from DEIA is not his style. So it was removed altogether, and the bureaucrats cared more about going with pendulum swing more than caring about any unintended effects, so anything associated with DEI was removed without any care about accessibility.
[1] https://web.archive.org/web/20250120152648/https://www.white...
ADA was used as a weapon against small businesses and caused a lot of products to change in unwanted ways for ADA compliance, leaving those who are only purchasing for personal use without good options, so I understand the opposition. Hopefully this leads to a more commonsense approach to accessibility instead of mandated bureaucratic box-ticking.