Hello,
1) Edit Typography settings of heading element, or add the next code in Theme Options > Theme custom CSS:
h2 {
font-size: 30px;
}
2) Create translation for XStore Core plugin.
3) YITH > Wishlist > Add to wishlist options > https://prnt.sc/uayd3c
https://xstore.helpscoutdocs.com/article/102-wishlist
Regards