Sort the order of post on home page

Hi,

Is this possible I sort the post order on ratings?

This is the code I added into functions.php:

// Sort the posts by highest to lowest rating order on home page. 
function custom_post_order_sort( $query ){
  if ( $query->is_main_query() && is_home() ){
    $query->set( 'orderby', 'meta_value' );
    $query->set( 'meta_key', 'ratings_average' );
    $query->set( 'order' , 'DSC' );
  }
}
add_action( 'pre_get_posts' , 'custom_post_order_sort' );

I guess if you can give me a “meta_key”, it seems like I can achieve it.

I saw a similar ticket 3 years ago and it says “impossible” at that time. Not sure if I can make it today.

This is the site: https://thehealthpursuit.com

Thanks.