When exporting products with advanced/printers and KDS is not shown as a printer;
Type the KDS name manually exactly as it appears on the Management Console - uppercase, lowercase, etc. If there are several KDS's, separate them with commas but without spaces. These can be added beside the kitchen printers.
KDS cannot be added if it has "-" in the name.
Next, check that all barcodes or SKUs, and other columns are accurate before importing the products back, .