Display Site Title and Tagline

add_filter( 'independent_show_title_tagline', 'independent_show_title_tagline_custom' );
function independent_show_title_tagline_custom( $cond ){
return true;
}

You can show tagline below logo with help of this code. Just copy this code and paste child theme function. After paste this code go to Appearance -> Customize -> Site Identity -> Display Site Title and Tagline -> Enable.