No way to customize accessibility for custom native components

[acoates-ms]

There is no way currently to customize the behavior of CompositionDynamicAutomationProvider for custom native components.

For example, if a control wanted to implement https://learn.microsoft.com/en-us/office/uia/word/wordcustomproperties

[acoates-ms]

See https://office.visualstudio.com/Office/_git/Office/pullrequest/4095952 for Paper ViewManager which needs to be implementable on fabric.

[Samyra312007]

I’d like to work on this issue because it’s a good entry point for me to start contributing to React Native Windows while also learning more about accessibility and custom native components. Accessibility is an area that makes a big difference for real users, and I’d like to gain hands-on experience in improving it. Since this issue is focused and impactful, I think it’s a great place for me to begin contributing meaningfully to the project.