since updating to 16.5 the vibration on my phone doesn't work

Thanks for reaching out MaryCFrench,

It sounds like you're having trouble with the vibrate feature on your iPhone. We can help.

A good place to start is with these steps to see How to put your iPhone on vibrate, ring, or silent mode:

Choose when your device vibrates

1. On iPhone 7 and later, go to Settings > Sounds & Haptics. On earlier iPhone models, go to Settings > Sounds.

2. You can choose if you want your iPhone to vibrate when set to Ring or Silent mode. If you turn off both settings, your iPhone won't vibrate.

Create a custom vibration

1. Go to Settings > Sounds & Haptics or Settings > Sounds. 

2. Select an option (like Ringtone or New Mail) under Sounds and Haptic Patterns or Sounds and Vibration Patterns. 

3. Tap Vibration, then tap Create New Vibration.

4. Tap the screen to create a pattern, then tap Stop.

5. Tap Play to test your vibration.

6. Tap Save and name your pattern. You can also tap Record to redo the custom vibration.

If you find the behavior continues after that, it could indicate a hardware issue and you can connect with Apple directly using either Get Support or if you're in a region without direct support options, you can also Contact Apple for support and service.

Hope that helps.

Take care.