Good morning! We chatted on the phone earlier, but in case anyone is following along you can adjust the number of images there for the combo block. If you hover your cursor over the block you'll notice a yellow toolbar which you'll want to click on the gear icon. On the pop-up there is a settings tab. Click on this and there will then be an option to adjust the number (count) of images.
Hopefully this helps, but please let me know if I can assist further.