Hello,
Add the below code to your Theme Options > Custom CSS to replace existing icons with the FontAwesome icons for example
.star-rating span:before, .star-rating:before {
content: '\f005 \f005 \f005 \f005 \f005';
font-family: "Font Awesome 5 Free";
}
Or I have uploaded Iconic font to XStore > Custom font. And you can use below code to show the iconic icon
.star-rating span:before, .star-rating:before {
content: '\e800 \e800 \e800 \e800 \e800';
font-family: "fontello";
font-size: 1.2rem;
}
Regards