wp_get_attachment_url not fetching URL?

then check like that:

$thumb_id = get_woocommerce_term_meta( $subcategory->term_id, 'thumbnail_id', true );
$term_img = wp_get_attachment_url(  $thumb_id );

and check like this

$meta = get_term_meta( $subcategory->term_id );
var_dump($meta);
$thumb_id = $meta['thumbnail_id'][0];
$term_img = wp_get_attachment_url(  $thumb_id );

and you also get like this

$thumbnail_id = get_term_meta( $subcategory->term_id, 'thumbnail_id', true );
$image = wp_get_attachment_url( $thumbnail_id );