Can I switch among zoomed images?
Full Page Zoom was designed to zoom in a single image and, as a consequence, it doesn't have a slideshow effect to switch among the thumbnails, unfortunately.
In the screenshot below you can see that the zoomed image at the forefront doesn't have any arrows or icons to switch the image. Depending on your theme, you must close the zoomed image, click on the next thumbnail and then click on the main image to trigger the zoom again.