Xamarin android Camera2 - image preview getting stretched on 18:9 aspect ratio devices

Question

On running the Camera2Basic in 18:9 screen aspect ratio devices, the image preview and captured image is getting stretched.

Device camera and camera2 basic side by side:

How would i resolve this while keeping the preview ratio as 1.33? I tried setting the height of the texture preview by keeping the ratio 1.33 as constant and scaling the height with width as 1080.

    var ratio = 1.33;
    var scaledWidth = mPreviewSize.Height;
    var scaledHeight = (int)Java.Lang.Math.Round(scaledWidth * ratio);
    mTextureView.SetAspectRatio(scaledWidth, scaledHeight);

But result is still the same.