hi im stuck on the same issue.

the documentation dont really helps.

try this

using Range = Android.Util.Range;

var fps = characteristics?.Get(CameraCharacteristics.ControlAeAvailableTargetFpsRanges)!.ToArray<Range>();


for (int i = 0; i < fps.Length; i++)
{
    Console.WriteLine($"FPS Range : {fps[i].Lower} - {fps[i].Upper}");
}