Why are not all images uploaded to github pages?

Question

GitHub

I can't figure out why some of them are loaded (for example, the logo in the header, footer and icons in the footer), while the rest are not. Everything is done according to one template, through gulp. Those. as I understand it, whether it should load everything or nothing at all. And then it loads selectively. Does anyone know the reason for this behaviour? Or where to look?
PS everything works on the local computer.
Landing page

Answer 1

Or where to look?

F12