Siri is not responding on iPhone XR on iOS 18.3.1

"Siri working with AirPods only: I have an iPhone XR on iOS 18.3.1 and Siri is not responding. The mic works fine. Siri will respond if headphones are plugged in but nothing using only the handset."

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Troubleshooting SIRI After Installing an Updates:

A. Start here: If "Hey Siri" isn't Working on your iPhone or iPad - Apple Support

B. Restore your iPhone from a Backup:

Have any backups of this iPhone prior to this occurrence? If so, restore your iPhone from one that has these photos (the most recent backup, ideally). If not, then take this as a learning experience, knowing to always back up your device for recovery purposes. Important: Back up you iPhone prior to performing this restoration, should anything go wrong from here on out.

C. Report this to Apple:

Do your part: Let Apple know what is going on here. Provide them with feedback on this. They may not get back to you directly, but the more feedback they received on this, the more they will know what is going on, and what needs to be fixed in updates to come.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: that this all began after installing and update, and how you have troubleshot it this far. Include the URL of this thread.
4. Proceed from there aw necessary