> I’m pretty sure to zero extent.

There is a lot, waymo gives out a bunch of data.

https://waymo.com/open/

You can see people testing it in videos like this

https://www.youtube.com/watch?v=HNwCDacDE2g

Google gives out a massive amount of data from many of their parts for free, so not sure why you would think they wouldn't do so here. They don't give out all of it but large parts, they are very research friendly.