'Flutter Permission Request does not appear

I would like that when it is the first time on the application, it asks the user if it can access the photos.

But when I uninstall the application to test, the application never asks me if it can access it. It accesses it directly.

How resolve that ?

if (await Permission.photos.request().isGranted) {
      //CODE
    }

AndroidManifest :

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

flutter dart

Sources

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