Role is not defined for the play/pause control.

Is it an issue related to Adaptive Cards?

Yes, this is related to Adaptive Card. However, it does not repro on Adaptive Cards Designer.

What is the PWD impact?

When the role is not defined for the play/pause control, screen reader users cannot understand what type of element it is or how to interact with it. They may only hear “button” or nothing at all, leaving them unsure whether it controls audio, video, or another function.

What browsers and screen readers do this issue affect?

Windows: Edge with Windows Narrator

Are there any code-based customization done to Web Chat?

No, I am using Web Chat without any customizations except "styleOptions".

What version of Web Chat are you using?

Latest production

Which area does this issue affect?

Others or unrelated

What is the public URL for the website?

No response

How to reproduce the issue?

Repro Steps: ​

1. Open URL: Web Chat in edge browser.
2. Ask query 'Audio'.
3. Navigate to Pay/pause control present in bot response.
4. Observe the issue that Role is not defined for the play/pause control.

What do you expect?

Role as button should be defined for the play/pause control.

What actually happened?

Role is not defined for the play/pause control.

Do you have any screenshots or recordings to repro the issue?

https://github.com/user-attachments/assets/92cc09d1-765f-43cd-9a61-f91b61e53815

Did you find any DOM elements that might have caused the issue?

No response

MAS reference

No response

WCAG reference

https://www.w3.org/WAI/WCAG21/Understanding/name-role-value

WAI-ARIA reference

No response

Adaptive Card JSON

Additional context

No response

Start by reproducing the play/pause control in a Web Chat bot response using Edge with Windows Narrator, then inspect the control's DOM accessibility properties. Done means the control exposes a button role and screen reader users can identify how to interact with it.