Dear Brad,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
According to your description, it seems that the standout mode button is missing in your Teams. Regarding this, could you please kindly let us know what Teams you are using? Teams desktop client or Teams Web App: https://teams.microsoft.com/ ? If this issue happening on Teams desktop client, we kindly suggest you log in to your account on Teams Web App: https://teams.microsoft.com/ and refer Engage your audience with presenter modes (microsoft.com) to check whether the presenter mode available in Teams Web App.
Sincerely,
Tommy | Microsoft Community Moderator
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