Hi,
no, the icons aren’t showing. Also the default icons you put there can’t be uploaded again and don’t show up.

I’ve alredy tried changing svg export on illustrator, but it seems not a problem of elementor, we can’t make also your icons showing.

I would like to show you some screenshots of the problems.

Uploaded screenshots here:

svg icon

the 3rd image is the service box of the template without any alteration.
Your icon is not showing on the elementor preview