where you can find an empty, but configured correctly project for android, or a tutorial … because when I create a new project on which there is almost nothing, one cylinder and plane, but when I launch on the android FPS less than 60 … what needs to be changed in unity to achieve stable 60 fps … the brakes due to the engine itself

On code, you can set this on a script

void Awake()
  // Limit the framerate to 60 to keep device from burning through cpu
  Application.targetFrameRate = 60;

Due to device limitations, you may also need to drop your Project-Quality settings. This is found under Unity->Edit->Project Settings->Quality