With new Shopify customer accounts, any edits you make to an order (such as removing an item or changing the quantity) in your Shopify admin will be reflected in real time on the customer's account page.
With previous customer accounts, there was a limitation where edits made on the admin screen were not reflected on your personal page , but this has been resolved with new customer accounts.
By the way, Shopify has announced a policy to gradually phase out traditional customer accounts, so this will be the case for all stores in the future, which will be helpful.
Order edits made on the admin page are reflected in customer accounts in real time.

