Some of the images in that template are stored as encoded data in the image component itself. If you look at the image component properties, you’ll see something like this:
The images get encoded that way when you upload them using the up arrow pictured in the screenshot.
The thing is, right now those images are encoded in an inefficient way and doing too many image components like that will make the app slower to load. You’re far better off uploading images to assets, and then using those images in the image component.
To do that in the image component source put something like this _/theme/home-img.jpg to load in an image at the top level of assets named home-img.jpg.
If none of that answers your question, you may need to share a clone link.