My iPhone 16 Pro Max don't vibrate when set to always play

This is the only system-wide setting to disable haptics.

Settings → Accessibility → Touch → Vibration → Off

When this switch is off, all vibration on your iPhone will be disabled, including those for earthquake, tsunami, and other emergency alerts.

Check all the other places where you can set Sounds & Haptics.

1. Settings > Accessibility > Touch > Vibration [Enable]
2. General Sound & Haptics (See the Pic below)
   1. 
3. Alarm (See the pic below)
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4. Phone Ring Tone (See the pic below)
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5. For Email Haptics see the steps below on iOS 18
6. Overall Sounds & Haptics
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7. Customise for Individual Accounts and Sub-categories
   1.