View google map on a 50 miles radius around my location

Question

I've been tasked to set a feature which requires setting the default view on google maps to be 50 miles radius around the user's location. Here's my implementation

private fun calculateZoomLevel(): Float {
    val equatorLength = 40075017.0
    val displayMetrics = DisplayMetrics()

    @Suppress("DEPRECATION")
    val widthInPixels = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R){
        requireActivity().windowManager.defaultDisplay.getMetrics(displayMetrics)
        displayMetrics.widthPixels
    } else {
        val windowMetrics = requireActivity().windowManager.currentWindowMetrics
        val insets = windowMetrics.windowInsets.getInsetsIgnoringVisibility(WindowInsets.Type.systemBars())
        windowMetrics.bounds.width().minus(insets.left).minus(insets.right)
    }
    val equatorLengthInPx = dpToPx(256)    // I've tried 256 in px or dp.. In both cases, the default view is still far from the 50 miles radius view
    Log.e(this::class.java.simpleName, "Length in pixel: $equatorLengthInPx")
    var metersPerPixel = equatorLength / equatorLengthInPx

    var zoomLevel = 1
    val radiusInMeters = milesToMeters(50.0)
    while ((metersPerPixel * widthInPixels) > radiusInMeters) {
        metersPerPixel /= 2
        zoomLevel++
    }
    Log.e(this::class.java.simpleName, "zoom level = $zoomLevel")

    return zoomLevel.toFloat()
}

I tested this but the map is viewed on a radius < 10 miles

I tried a couple of solutions from this link: Android: How do I set the zoom level of map view to 1 km radius around my current location?

None of them provide a more reliable calculation. Any ideas are welcomed