Get programmatically the customizable options selected of the product in an order

by |Published August 30, 2021

I wrote a custom extension to send an email on success.
I manage to get the details of the products in the order like

  $product_name = $_item->getName();
  $product_sku = $_item->getSku();

but I cant retrieve the selected customizable options for each one. (For ex color:red…) How could I do it?