2023 ES300h Rear Squeak

Has anyone had or experienced in any of their cars squeaking from the rear of the vehilcle? It happens whenever I go over a speed bump or bumps over road. It's a very subtle squeak, it started in the rear right tire about a year ago (car had about 10k miles), I took it to Lexus and they couldn't find anything wrong in suspension or rods or anything. So I lived with it. Now I also hear it when my left rear tire area goes over a speed bump or any bumps on the road. I can hear it inside but obviously it's louder from outside.

It's driving me nuts to find out what it is...I feel like something needs to be lubricated? It's definitely suspension related, right?