Can you use a iPhone on a charging pad

Yes! All iPhones from the iPhone 8 to the latest include wireless charging, so if you've got one of the newer iPhones you should be able to wirelessly charge with no issue.

You can find more information here:

How to wirelessly charge your iPhone - Apple Support

Becklez99 wrote:

Can u use a charging pad on a iPhone

If you have an iPhone 7, as your post indicates, it does not support wireless charging.