Q: Taptic Vibrating not strong enough.

Hi

On your iPhone, in the Watch app, go to: My Watch (tab) > Sounds & Haptics:

- Check that Haptic Strength is set to the middle or far right hand side of the slider;

- You may also wish to enable Prominent Haptic (to receive pre-announcements of common alerts).

More information:

Adjust the intensity of haptic alerts on your Apple Watch - Apple Support

For the best performance from features including the Taptic Engine feedback, also ensure that you are wearing your watch sufficiently tightly.

The band should be neither too tight nor too loose, with the back of your watch in contact with your skin, whilst allowing room for your skin to breathe:

More information:

Wearing Apple Watch - Apple Support