Hi @hangdaniberia
Place below CSS code to theme.scss.css file,
div#shopify-section-image-content .section-block, div#shopify-section-image-content svg, div#shopify-section-image-content img {
border-radius: 15px;
}
As I didn’t found that specific images you shared as screenshot but i managed to create the css code for current sections on home page. check screenshot: https://prnt.sc/M2CmG9c8YfNc