vibrate

Heres how to turn on vibrations for texts:

1. Open settings, then go to Sounds & Haptics.
2. Scroll down and tap Text Tone.
3. Tap vibration.
4. Choose a vibration. This can be a pre-made one, or a custom one.
5. You should now get a vibration when you get a text message.

To turn on vibrations for other notifications, follow these steps:

1. Open settings, then go to Sounds & Haptics.
2. Choose the alert you want your phon to vibrate for.
3. Press Vibration.
4. Choose a vibration. This can be a pre-made one, or a custom one.
5. You should now get a vibration for the alert you chose.

I don’t think you can turn on vibrations for other apps.

Hopefully this helps!

Do you have the setting or settings for what you want turned on?

Settings > Sound & Haptics > Play Haptics in Ring Mode and/or Play Haptics in Silent Mode

In that case, it might be an issue with the hardware itself. How long has this issue been going?