Siri not working on iPhone xr

If you have followed all these steps correctly

Check if "Hey Siri" is turned on

1. Go to Settings.
2. Tap Siri & Search.
3. From here, make sure the following settings are turned on:

• • Listen for "Hey Siri"
  • Allow Siri When Locked

Set up Siri to recognize your voice

1. Go to Settings.
2. Tap Siri & Search.
3. Turn off Listen for "Hey Siri," then turn it back on.
4. When the Set Up "Hey Siri" screen appears, tap Continue.
5. Say each command that you see on your screen.
6. Tap Done.

If Siri stops responding

1. Go to Settings.
2. Tap Siri & Search.
3. Tap Siri Responses. 
4. Tap Prefer Spoken Responses to hear Siri speak responses, even when Silent mode is turned on.

Get more help with Siri

• Is the wrong device responding to "Hey Siri?" Learn how "Hey Siri" works with multiple devices.
• Learn how to change the volume of Siri's voice.
• If Siri activates when you press the side or Home button, but doesn't activate when you say "Hey Siri," contact Apple Support.

Contact Apple support to seek service for your device

Contact - Official Apple Support