Hooray! My tracking number looks to have come through as well!
Re links in Backerkit, @Philips_Support_N mentioned on General info about shipment and manufacturing that BackerKit mandates a URL for each tracking number, which they didn’t have in their CSV, so rather than delay everyone getting their tracking numbers they just put in 17Track as a placeholder.
17Track can be used to track shipments (once the Couriers have data in their systems).