Why are disconnected channels still showing data in commerce dashboard?

Welcome to the Community, @yryr-parts-gmail. I'm happy to share some info about disconnecting a sales channel in QuickBooks Commerce. 

When you disconnect a sales channel in QuickBooks Commerce, the system does not automatically remove the downloaded data. 

You can only delete them manually by opening each of the transactions or products and services one at a time. Follow the steps below to proceed:

Delete a transaction:

1. Navigate to the Sales Orders menu and look for Orders.
2. Next, open each transaction that you want to delete.
3. Then, select the More actions button and click Delete.
4. Once done, select Yes, Delete Order.

Remove products and services: 

1. Go to the Inventory section and click Products.
2. Next, check the boxes next to the products you want to delete.
3. In the Bulk Actions dropdown menu, choose Delete Products.
4. Then, enter the displayed confirmation word to proceed.

I've also got here this helpful resource to further provide info on managing your QuickBooks Commerce dashboard: Learn about your dashboard in QuickBooks Commerce.

For additional reference, feel free to check this article: QuickBooks Commerce Accounting FAQ. 

I want to know how the steps above help you. If there's anything else you need about managing your commerce dashboard, please don't hesitate to post again here. Have a good day and keep safe.