I found well order edit app, they have best solution for edit order from custom side as this is not available by shopify.
$4.99/month. 14-day free trial.
Allow your customers to effortlessly edit their order items and shipping address.
Allow customers to effortlessly update the quantity and variant of their ordered items after placing an order.
Allow customers to easily update the shipping address before the order has been fulfilled.
Set a time limit to updating orders and restrict customers from updating specific order.
Manage reduced order totals after updating the order by auto-refunding and receive notification via email.
I found well order edit app, they have best solution for edit order from custom side as this is not available by shopify.
Amazing app, now i can allow user to edit their order and shipping address.
Great app for allowing users to change their order after order placed, They have very great support.