WooCommerce Order Status Change Notifier allows you to add notes, control outbound mail notifications and store comments in tandem with native and custom order statuses.
Use Order Status Change Notifier to:
Record internal notes on why an order is being put in a particular status, without notifying the customer
Record notes about a status change that’s automatically sent to the customer, providing them with clear information on what’s happening with their order
Simplify changes by combining the status change and addition of notes/comments in a single activity
Include order status change notes/comments in all native WooCommerce email notifications
Add order status change notes/comments to any custom outbound email notification
Include order status change notes/comments in any third party facility with webhooks/filters
Change order statuses from the Actions column or from within the order. Comments can be saved to the order and included in outbound emails.