Same problem here. I'm glad I discovered this thread. My app is due for an update, I think I'll make a note to the users in the app, to notify them of the temporary problem. I hope it won't take too long for 13.3.
perdrix
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I've tested 13.3 on a physical iPhone 8. It doesn't work unless Siri is activated. So the user must have Siri activated in order for speech recognition to be available in my app.