Tiered Pricing Not Available In Backend

The tiered pricing works great on the front end, but in woo commerce if I try to create an order for an existing customers through the backend, – the tiered pricing is not showing at all.

here on the front end product detail page it works fine
https://myonatural.com/product/16oz-453g-myonatural-pump

but if O am here in the add order page in woocommerce it does not work.
https://myonatural.com/wp-admin/post-new.php?post_type=shop_order

The page I need help with: [log in to see the link]