File creation Kotlin Android 12 not working without device restart - json

Question

I am new to Android, I am trying to create 3 json files in device documents directory on app installation if the files do not already exist which they wont.
Problem is that the below sequence works in creating files successfully
device restart
app install
But following sequence is not able to create the files
app uninstall
manual file deletetion from devise
app install
what is going wrong?
Below is the code i am using to create file:
private fun createDirectory() {
val Dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS)
if (!Dir.exists()) {
Dir.mkdirs()
}
//create all files
val IncomeFile = File(Dir, "Income.json")
if(!IncomeFile.exists()) {
val data: String = "{\"Incomes\":[]}"
val out: FileOutputStream = FileOutputStream(IncomeFile)
out.write(data.toByteArray())
}
val InvFile = File(Dir, "Investments.json")
if(!InvFile.exists()) {
val data: String = "{\"Investments\":[]}"
val out: FileOutputStream = FileOutputStream(InvFile)
out.write(data.toByteArray())
}
val ExpensesFile = File(Dir, "Expenses.json")
if(!ExpensesFile.exists()) {
val data: String = "{\"Expenses\":[]}"
val out: FileOutputStream = FileOutputStream(ExpensesFile)
out.write(data.toByteArray())
}
}
I have the permission request before this:
private fun askPermission() {
ActivityCompat.requestPermissions( this, arrayOf(android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
android.Manifest.permission.READ_EXTERNAL_STORAGE),
PackageManager.PERMISSION_GRANTED)
}
I have the uses in manifest file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
Tried createFile and file.write(text) both not able to create new files.