Hello, @flexhazel,
Actually the demo you are using on your site, we have created the footer in using Static Block, and we have those icons as SVG icons by editing that static block, please see the below-given screenshots:
https://postimg.cc/hf5P8Df0
https://postimg.cc/fJGQTJV1
https://postimg.cc/NywyxXNX
So you can download any icon and set it as per your requirements from there.
You can check the below-given links:
Regards 8Themes Team.