Hello, @Liya,
1. Please copy and paste the below-given CSS code to XStore >> Theme Settings >> Theme Custom CSS >> Global CSS and check back to your site after removing the browser cache.
.widget.etheme_widget_search h2.widgettitle {
font-size: calc(var(--h5-size-proportion) * 1rem) !important;
}
2. That is actually the button for the search, If you want to add the content in it, then simply copy and paste the below-given CSS code to XStore >> Theme Settings >> Theme Custom CSS >> Global CSS and check back to your site after removing the browser cache.
form.woocommerce-product-search.etheme-custom-search button:after {
content: 'Search' !important;
}
You can change the word ‘Search’ in the given code as per your requirements.
Regards 8Themes Team.