Hello @sohughes1,

When we inspected your site URL we did not find any images in the header section .

In the theme you have two option available i.e. you can either show one image as header image or multiple image as slider .

Since you have multiple image you have to use the featured slider option.

Go to Admin Panel > Appearance > Customize > Featured Slider > Slider Type and enable the slider by chooisng Enabled Option in Slider Status option .

Then upload the images and links in the available field and save them. In this way you will have the slider in the header section .

Screenshot:
https://image.prntscr.com/image/qplOb_hlRHSAaWIijVc5Rg.png

Hope this helps.

Best Regards!!