I found the following code snippet that uses categories as the focus keyword, but I don't know how to change it to include the title in the focus keyword.
function update_product_focus_keywords()
{
$products = get_posts(array(
‘posts_per_page’ => 100,
‘post_type’ => ‘product’ //replace post with the name of your post type
));
foreach ($products as $p) {
$keywords = [];
if (get_the_terms($p->ID, ‘product_cat’)) {
foreach(get_the_terms($p->ID, ‘product_cat’) as $term) {
$keywords[] = strtolower($term->name);
}
update_post_meta($p->ID, ‘rank_math_focus_keyword’, implode(“, “, array_unique($keywords)));
}
}
}
add_action(‘init’, ‘update_product_focus_keywords’);