Open your app's Documents folder programmatically in Files app

Hi,
I want to open files in the Documents folder of an app in the Files app (iOS). In other words, I would like to implement the description in the following URL in Unity, is it possible?
https://nemecek.be/blog/145/open-your-apps-documents-folder-programmatically-in-files-app

In particular, I don't know how to specify the file path; Application.persistentDataPath didn't work.