tag H1 in only one caption for fullwidth slide

This solution are not good for SEO https://www.dicasafalcone.com/

#solution 1
add_filter(‘avf_logo_headline’,’avia_new_logo_span’);
function avia_new_logo_span(){
if(is_page(12)){
$output = “h1”;
}
else{
$output = “strong”;
}
return $output;
}

#solution 2

add_filter(‘avf_logo_headline’, ‘logo_new_tag’);
function logo_new_tag($headline_type) {
$headline_type = ‘h1’;
return $headline_type;
}
So I need to set H1 title for only first caption (Allevamento Pastore Tedesco Casa Falcone)