Camera.Parameters.setZoom() is inconsistent across devices, in some device it zooms more

I am making a custom camera app, and I am using the Android Camera API for that. I know this API is deprecated now and it is recommended to use the Camera2 API. But I have to only preview the camera with some zoom.

Below is the code for setting the zoom

Camera.Parameters parameters = camera.getParameters();
 parameters.setZoom(30);
  parameters.setPreviewFpsRange(
                previewFpsRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
                previewFpsRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
  parameters.setPreviewFormat(IMAGE_FORMAT);
 camera.setParameters(parameters);

Now, the problem is that the camera zoom is not equal across devices, some devices zoom in to a good amount whereas some devices zoom very much.

I am not able to find any explanation over the internet regarding the same.

I need the same zoom level across all the Android devices irrespective of the camera quality and MP.

from Camera.Parameters.setZoom() is inconsistent across devices, in some device it zooms more