It is in the dealership as I text this. Lexus came through and offered to cover the part (The most expensive part of the repair-about $1,300). I would have liked for them to cover the complete repair but it was good that they're doing something.

 

I have the same model, no noise.

 

L-SB 0032-23 is about 2016-22 RX4550H Brake Squawk/Knock Noise
Bring the car to Lexus dealer if that brake problem due to this Brake actuator