Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hi Jim,
Thank you for posting. I have tested on my side using Teams client version 1.2.00.13765 (64-bit). However, I can successfully get my Edge Browser window available to shareable app. Here is the screenshot for your reference:
You may try to check this issue via using another PC (e.g. any colleague PC) to determine whether it is specific client side issue.
Moreover, please provide us with Teams client version and detailed steps video which you have tried via the Private Message so that we can further assist you.
Best regards,
Shyamal