Can you add “Buy” in front of %title% in focus keyword? (with Functions code)

From https://rankmath.com/kb/how-to-automate-the-insertion-of-focus-keyword/

Automatically Use the Post Title as the Focus Keyword

/**
 * Function to automatically update the focus keyword with the post title
 */
function update_focus_keywords()
{
    $posts = get_posts(array(
        'posts_per_page'    => -1,
        'post_type'        => 'post' //replace post with the name of your post type
    ));
    foreach ($posts as $p) {
        update_post_meta($p->ID, 'rank_math_focus_keyword', strtolower(get_the_title($p->ID)));
    }
}
add_action('init', 'update_focus_keywords');

Is it possible to insert word “Buy” in front of every Focus Keyword? Basically right now it would use title of the product, I assume this code will work for products too? So if the product is called “Nike Shoes” then Focus Keyword would be “Nike Shoes”. I am wondering if it’s possible to add to this automatization “Buy %Title%” so “Buy Nike Shoes”. (I know %title% doesn’t work for focus keyword, just an example)

Thank you!