Hello @lunacer,
Thank you for reaching out,
The font family name is WooCommerce, it could be affected by cache or CDN, please check this screenshot: https://postimg.cc/Dm5BrT9K and this one: https://postimg.cc/vcsxZgqY.
To solve it, you can use the classic WooCommerce shortcode instead of blocks: https://woocommerce.com/document/woocommerce-shortcodes/
Or put the CSS below in Customizing > Custom CSS/JS > CSS Code:
.wc-block-grid__product-add-to-cart.wp-block-button .wp-block-button__link.loading:after {
content: "\f110";
font-family: "FontAwesome";
font-weight: 900;
}
Please read this link for more information about the CSS/JS code on the customizer: https://docs.oceanwp.org/article/354-add-custom-css-and-js-to-your-website.
Note: If you have any cache plugin or server cache(CDN / Browser Cache and Cookies and …), you need to clear its cache contents or disable them to see your changes. Also, remember to click on the regenerate all assets file and data in Elementor > Tools(if you have Elementor).
I hope that helps.
Best Regards