Hello,
We have checked your site and missing images. Seems that you use webp format of the images that is not supported by Safari https://discussions.apple.com/thread/250073758
So, your issue is not related to our theme but to images format that you use. Upload png or jpg images to avoid problem. We re-uploaded your logo and icon in png format and it works http://prntscr.com/qxae84
Regards