You can try the following steps to stop your iPhone 11 from vibrating:

Turn off all vibration settings: Go to "Settings" > "Sounds & Haptics" and turn off all toggle switches under the "Vibrate on Silent" and "Ringers and Alerts" sections.

Disable vibration for specific app notifications: Go to "Settings" > "Notifications" and select the app that is causing the vibration. Turn off the "Allow Notifications" toggle switch or the "Vibrate" option in the app's notification settings.

Turn off haptic feedback: Go to "Settings" > "General" > "Accessibility" > "Haptic Touch" and turn off the toggle switch for "System Haptics".

Disable Raise to Wake: Go to "Settings" > "Display & Brightness" and turn off the "Raise to Wake" toggle switch.

If these steps do not work, you may need to restart your iPhone or reset all settings. If the issue persists, you may want to consider contacting Apple Support for further assistance.
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