Add a Read More button below content/excerpts in Genesis

add_action( 'genesis_entry_content', 'gk_custom_add_read_more' );
/**
 * Add Read More button below post excerpts/content on archives.
 */
function gk_custom_add_read_more() {
    // if this is a singular page, abort.
    if ( is_singular() ) {
        return;
    }

    printf( '<a href="%s" class="more-link button">%s</a>', get_permalink(), esc_html__( 'Continue Reading' ) );
}

add_action( 'genesis_entry_content', 'gk_blog_add_read_more' );
/**
 * Add Read More button below post excerpts/content on Blog Page.
 */
function gk_blog_add_read_more() {
    // if this is not post page, abort.
    if ( ! is_home() ) {
        return;
    }

    printf( '<a href="%s" class="more-link button">%s</a>', get_permalink(), esc_html__( '[Continue Reading]' ) );
}