You are confusing radar and lidar I think. True solid state automotive lidar is largely still in a research state. Most 'solid state' lidar sensors actually have very tiny moving parts in the form of MEMS assemblies. Even more delicate than a macro mechanical assembly.

But for radar, correct, those modules are available as a commodity for automotive lifescales.

The general problem is that simple, cost effective radar is low precision while expensive, complex lidar is high precision.

Looks like the 2022 Wey SUV from Great Wall Motors will have a true solid state lidar from Ibeo / ZF.