There is no such evidence beyond unsupported proclamations by the vendor who, by the way, has compulsively misrepresented the capabilities of the product for years. The only evidence available that is not completely tainted by a complete conflict of interest is basically Youtube videos and self reported information [1] by investors and super fans that on average show critical driving errors every few minutes and even those are tainted by self interest to over-represent the product.

Tesla’s statements should only be believed if they stop deliberately hiding the data from the CA DMV by declaring that FSD does not technically count as a autonomous driving system and is thus not subject to the mandatory reporting requirements for autonomous systems in development. If they did that then there could actually be a sound independent third party statements about their systems. Until that time their claims should be as trusted as Ford’s were on the Pinto.

[1] https://www.teslafsdtracker.com/

Yes if we forget that the FSD may conveniently disconnect right before an accident

Regardless of whether or not that's true, that's also not the impressive number you think it is. Human-driven cars have a fatality rate of about 1 per 100 million miles travelled, and that's including drunk drivers, inattentive drivers, and all environments, not just the ones people are comfortable turning on these features in.