I'm asking for the MANAGE_EXTERNAL_STORAGE permission:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
        tools:ignore="AllFilesAccessPolicy" />

    <application
        ...

And I'm calling this function from the Activity's onCreate:

@RequiresApi(Build.VERSION_CODES.R)
fun checkStoragePermission() {
    Manifest.permission.MANAGE_EXTERNAL_STORAGE.let {
        val permission = ContextCompat.checkSelfPermission(this,it)
        Log.d("--- MusinK ---", "MANAGE_EXTERNAL_STORAGE: $permission")
        if (permission != PackageManager.PERMISSION_GRANTED) {
            Log.d("--- MusinK ---", "requesting...")
            requestPermissions(this, arrayOf(it), 7)
        }
    }
}

The value for permission is -1 and requesting... is logged, but there is no corresponding user dialog. What am I missing?

Note: I don't care for Google's policies. This app won't go to the PlayStore. I have my phone connected via USB, and when I hit run in Android Studio, I want to see the dialog.

I have deleted the app several times already; thus, this is not caused by previous denials.

if (!Environment.isExternalStorageManager()) {
    val intent = Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION)
    intent.data = Uri.parse("package:$packageName")
    startActivity(intent)
}