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I’ve removed your other threads identical to this one. Please keep the discussion to your problem to this thread only. It will more likely help solve your issue.
You might try this:
If you haven’t done that before, restart your iPhone.
Make sure neither notch nor your face are covered.
The latest iOS version for your device is 13.5. If you haven’t done it yet, update to this software version. If might help with your problem.