Focus Point should work for all different kind of Elements

• Hero Slider

• All Banners/Sliders

• Media Asset itself when included in a Page

Hero Slider

Here you should see a difference in the Image, on which part the Focus Point falls.

Banner

Here you should see a difference in the Image, on which part the Focus Point falls.

Slider

Media Asset

Here the Focus point would not make any difference, because you always see the whole Picture itself.