Commerce5 now includes a form in Counterpoint that will identify items that have been checked as ecommerce items but have not been uploaded due to missing required data.
This form can be found by navigating to Commerce5 > Item Cleanup > View Ecommerce Items Missing Data
Note - This data is most easily viewed in Table view which can be accessed by clicking Edit > Table View:
The most common missing data is Missing Inventory Record at Stocking Location and Missing [Website Name]
To address Missing Inventory Record at Stocking Location items, open the item and click Inventory in the bottom left corner of the item record and select the Location being used as the stocking location, then click Create inventory.
To address Missing [Website Name] products, add a value to the field being used as the website product name.