Volvo sold the three point seatbelt for nine years before the US government required it.
Volvo had them standard, but Volvo has also never been above 1% market share in the US [1]. If a tree falls in a forest and nobody is there to hear it, does it make a sound?
[1] https://knoema.com/infographics/floslle/top-vehicle-manufact...
The part we should be worried about is that it took 9 years for the govt to require it. 50 years from now, we'll be talking about how stupid it was that drones didn't have safety features.