Yes! Oliver pulls in your product data directly from WooCommerce, so whatever barcode you have set in your product’s default barcode field is what will sync to your POS and/or Kiosk. This can be a UPC, EAN, or any numerical barcode you generate yourself.
As long as you have a barcode scanner and your products have a valid barcode reference in your WooCommerce shop, you will be able to search products using their barcodes in Oliver POS and Kiosk.