.entry-content .wp-block-rss,
.wp-block-rss{
    li{
        margin-bottom: 25px;
    }
    li:last-child{
        margin-bottom: 0;
    }
}
.wp-block-rss__item-author, .wp-block-rss__item-publish-date{
    font-size: 1.2rem;
}