Why is 2d camera not smooth at 30 FPS

Hi, I'm working on a 2d game. I have my camera following my player in the LateUpdate method. On my PC everything is really smooth as I'm getting 600+ FPS. When I build on mobile and its capped at 30 FPS, everything in the game seems really shaky/jittery except my player that is being followed. I also tested it on my PC by setting Application.targetFrameRate = 30, and it was jittery on my PC then. I also tried turning off the follow script and just moving my camera with WASD (exactly how I move my player), and everything was still jittery. Obviously its related to having a low frame rate, but isn't there a lot of games that run at 30 FPS, especially mobile? I don't know how to make it smooth :(