You can export all merged SKUs into a CSV file, please follow the steps outlined below to generate this export report.
Please select Inventory-> inventory & listings
Select other actions-> export all merged SKU's
The below window will then appear
It can take between 20-30 minutes for your report to be exported.
To view your report please select Inventory-> bulk actions
Next please select bulk exports-> then click on the file icon to download your report.
Please click on the link below to download a sample file, and view the data that is included in this export report.