og:url filter for paginated posts

I’m trying to ensure that the URL in og:url for paginated posts is always the first post. So, if someone shares from page 3 it will always share the top level URL (or at least the og:url will be the top level with no /2/ in it).

I found this function

function md_no_paging_in_og( $url ) {
	if ( is_singular( array( 'post', 'page' ) ) ) {
		$url = WPSEO_Frontend::get_instance()->canonical( false, true );
	}
	return $url;
};
add_filter( 'wpseo_opengraph_url', 'md_no_paging_in_og' );

But it’s not working. Any ideas how I can do this?