Ah, totally fair. I took that to be "unapproved all the way back to the designer." Which, yeah, that doesn't happen. It almost certainly has approval from a line manager at the bare minimum, if it helps perform the assembly. If it goes to more teams than a single line, it gets more approval.

I think I largely biased to the next message, which did indicate reviews would happen, but that they have some freedom at the line. And that still sounds right to me.