No. Iced has no accessibility support built in. It's a pretty hard thing to do, so it's not surprising that something more hobby driven doesn't have it.

I hope that System76 invest into adding accessibility support into Iced, because they are using it to build Cosmic (the official desktop environment for Pop_OS).

They've committed to adding accessibility features. Iirc COSMIC right now has screen reader, magnification, and high contrast/invert colors support.

There is a really long way to go though, and accessibility on mobile comes with its own challenges as well. It will take a long time.