[IshKebab]

Accessibility can be implemented for third party GUI toolkits.

Qt: https://doc.qt.io/qt-6/accessible.html

Web: https://developer.mozilla.org/en-US/docs/Web/Accessibility

Even immediate mode toolkits can do it: https://news.ycombinator.com/item?id=33859697

Accessibility is not a reason to use first party widgets. It's a reason to use widgets with good accessibility support.

[omeid2]

In theory, in practice the myriad of devices and software is rarely tested or works properly beyond official mac and windows interfaces, and maybe gtk and qt if you're very lucky.