Edge function test via Dashboard does not show impersonation option

I deployed an edge function via the dashboard and simply want to test the behavior as an authenticated user. I saw that it's possible in screenshots from other users as well as the YouTube video were the edge function deploy via dashboard feature was announced.

But as you can see in my screenshot, I don't see the option to impersonate an authenticated user. Do I need to enable anything for this or is this a bug?
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