I don't think that's actually law about the 10 year supply, it happened with BA/BF front seatbelt assemblies nearly 10 years ago - the supplier closed down and everything just sat on back order for eternity with no updates or information.
I'm still waiting for Jefferson Ford to supply me front passenger side seatbelt on a BF ute I've had on backorder since 2015
From 2015-2017 I'd chase it up and it would still be on backorder and the ETA just kept moving out with no explanation.
It could be a case of
NLA from supplier who supplies Ford. It won't be Ford who is the manufacturer it will be part of their supply chain who may not manufacture it anymore.