Hey,
I can’t suggest you do this if your not comfortable with the code. This isn’t something I would recommend regardless, categories are a form of defining what is related.
However, I can point you in the right direction as long as you understand this is not a “support” thing, you would need to hire a developer if you need custom work or custom code.
https://kadence-theme.com/knowledge-base/advanced/how-to-add-a-custom-filter-or-function-with-code-snippets/
add_filter('kadence_related_posts_args', 'custom_related_args' );
function custom_related_args( $args ) {
$post_id = get_the_ID();
$tags = get_the_terms( $post_id, 'post_tag' );
if ( empty( $tags ) || is_wp_error( $tags ) ) {
$tags = array();
}
$tag_list = wp_list_pluck( $tags, 'slug' );
$args = array(
'post_type' => 'post',
'posts_per_page' => 6,
'no_found_rows' => true,
'post_status' => 'publish',
'post__not_in' => array( $post_id ),
'orderby' => 'rand',
'tax_query' => array(
array(
'taxonomy' => 'post_tag',
'field' => 'slug',
'terms' => $tag_list,
),
),
);
return $args;
}