It looks like this is probably due to geographical restrictions on where albums are available (which I now see was also mentioned at Qobuz importer script - #9 by Sp00kyFox). I’m not sure there’s much that I can do about this unless there’s some secret way to pass a country code to the Qobuz API. https://yambs.erat.org/ is running in GCP’s us-central region, so it might only be possible to get barcodes for releases that are available in the US.