rest api custom endpoint

hi
i have a custom endpoint for creating posts, the post will create successfully and published but won’t send to telegram.
if i use the default endpoint -> POST /wp/v2/posts works fine and sends the post to Telegram.
my Endpoint code is :

function mycustom( WP_REST_Request $request ){
	$my_post = array(
		'post_title'    => $request['title'],
		'post_content'  => $request['content'],
		'post_status'   => $request['status'],
		'post_excerpt'   => $request['excerpt'],
		'post_author'   => 1,
		'tax_input' => array( 'category' => $request['category'], 'post_tag' => $request['tags'])
	);

	// Insert the post into the database
	$pid = wp_insert_post( $my_post );

	return "ok";
}

  add_action( 'rest_api_init', function () {
	register_rest_route( 'wp/v2', '/mycustom', array(
	  'methods' => 'POST',
	  'callback' => 'cpost',
	) );
  } );