Hi,
Add below code to Theme Options -> Global CSS
.content-product .yith-wcwl-add-to-wishlist a:before{
font-family: 'xstore-icons';
}
.yith-wcwl-add-to-wishlist a::before,
.yith-wcwl-add-to-wishlist a.button::before {
content: "\e908";
font-size: 16px;
}
.footer-product .yith-wcwl-add-to-wishlist{
justify-content: center;
}
Regards,
Hung PD