Which Article Nr to publish as additional trade item identification?
Per product / shipping unit the manufacturer / supplier identifier can be published to GS1, 2BA & InstallData. Check out the Flow.
Per product and per shipping unit, there are fields in GS1, 2BA and InstallData for the manufacturer/supplier identifier. This field can be filled from SyncForce with quite an extensive logic.
Check out this Flow for the full logic.