Order Approval System

This feature allows admin to reject or approve all the orders placed by the customers according to one of those two workflows (that admin have to select through the Settings menu):
Pay and wait for approval: the customer will normally place the order as it happens for any WooCommerce order. The site admin can lately approve or reject the order. For both cases, the customer will receive a notification email.
Wait for approval and pay: the customer will place the order without being charged. Once the order will be marked as approved the customer has to manually pay for it through the order details page.

Note: If admin wants to use this order approval system only came from specific page/campaigns/products, then there must be an option to select the page/campaign/products. (Not for all orders)

Hope i will get positive response from you.