Accessibility is actually a really big deal here on Flutter (Ian Hickson and I both worked on Accessibility in browsers for years). AX is something I feel we've done pretty well with on iOS and Android. Web is still pretty early days, but many AX features should work already. We have more AX work to do on web yet. We've not yet taken any Flutter Web apps through Google's accessibility testing processes similar to how we've done on the mobile side, but I expect we will soon.