As a follow up to this question, consider a phone with Android 11 and telegram installed on it.
Consider that the user joins many groups, download some files from them and leaves some group, loosing track which groups he first joint and then left.
So now he has many useless files that he wants to delete to free some space. In old Android version, one could access the Telegram folder and check which files were in and eventually delete it. In android 11, from the answer to the question I've linked, this is not possible directly (or at least no as easily as before): how can one check which files are present on their Telegram folder/in his phone and eventually delete them?