Subaru's eyesight uses cameras
I’m guessing (but didn’t check!) Subaru also has the radar too.
Doesn’t help in this situation though.
Radar typically applies to the ACC system while camera applies to LKAS or lane centering. Rarely are the two connected. FSD and comma.ai are probably the only systems which combine the two.
That might be true for some vehicles only.
Subaru EyeSight cameras (there are 2x front cameras and 1x rear camera) are also used to detect moving and stationary objects, and it will engage the emergency braking if, e.g., you are driving or reversing into a wall. Lane detection can be disabled on Subaru cars, yet the EyeSight will continue to scan surroundings and be ready to start breaking.
As of this year, the EyeSight is available even on Subaru BRZ 2nd gen with the manual transmisson.
How does it manage that? Is the clutch electrically controlled?
According to this video, breaks will be applied automatically, even if it is in neutral or if the engine stalls: https://youtu.be/8WIydvZZ23I