Request for permission (Pop – up) dialog is not showing in Android

I have the following register initialized in onCreate method of an AppCompatActivity class:

ActivityResultLauncher<String> requestPermissionLauncher =
                registerForActivityResult(new ActivityResultContracts.RequestPermission(), isGranted -> {
                    if (!isGranted) {
                        Toasty.error(context, "Can't continue without the required permissions", Toast.LENGTH_LONG).show();
                    }
                });

then when a button is clicked the following code checks for the permission:

if (ActivityCompat.checkSelfPermission(context,
                Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            requestPermissionLauncher.launch(Manifest.permission.READ_EXTERNAL_STORAGE);
            return;
        }

However, the Request for permission – the Pop-up dialog is not showing and I am getting a Toast notification as above as permission is found not granted.

The app is running on a physical device with Android 14. I have checked the permission flag of my device using "adb shell dumpsys package MY_PACAKGE_NAME" command and have got the flags as –

android.permission.READ_EXTERNAL_STORAGE: granted=false, flags=[ USER_SENSITIVE_WHEN_GRANTED|USER_SENSITIVE_WHEN_DENIED|RESTRICTION_INSTALLER_EXEMPT]

The above indicates – the required permission request has not been denied multiple times due to which the pop-up dialog might not show anymore. The flags "USER_SET | USER_FIXED" is not found which means similar to "don’t ask again" as mentioned in this google developer documentation link.

Both my app manifest and the merged manifest has the following –

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

My build.gradle file has the following –

minSdkVersion 28
targetSdkVersion 34

I have tried with clear all data, then complete uninstalling of the app and reinstalling the app with no results.

The pop-up is showing on Emulator running with Android 12L.

I have tried enabling all the permissions required from the "App Info > App permissions" – still my app fails to read external storage i.e. all the images from the external media bucket (from other shared folders – from other apps like facebook, whatsapp, download folder etc. Only DCIM camera folder pictures are being read by my app).

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