The gap you are paying for
Your inside sales and service people work in Shopify all day. The balance, the invoice, the tracking number and the order status all live in Sage, and most of them do not have a Sage seat. So every question becomes a message to whoever does, and the customer waits while it bounces.
What closing it looks like
Shopify orders land in Sage as sales orders instead of being keyed twice, and invoice and shipment data comes back the other way, so the order in Shopify carries its Sage number, its status and its tracking. The aging you just looked at stops being a report someone runs and becomes something anyone can see.
Sage stays the system of record and the integration never writes what it should not. That is ForgeSync Enterprise. It is a real project with a real install, not a switch, and it is priced like one.