How can the order of elements in the Accessibility Tree (a.k.a. Accessibility UI) be specified for a Xamarin.Forms app? In a native iOS app I would override accessibilityElements, but XF doesn't seem to have an equivalent.
The order required for a particular page is not the same as Left-Right, Top-Bottom even in locales where the visual UI would be read that way, nor is it the same as the tab order (i.e. IsTabStop + TabIndex combination) of the visual UI. The order for accessibility needs to include some elements that have IsTabStop = false for the visual UI. Also, I am not using Shell.