My documents (in my apps) do not appear in iTunes (file sharing).

Hello,

When connecting your iPhone to your computer, did you authorize it to connect by confirming the "Trust This Computer" alert?

If not, disconnect your iPhone and close iTunes. On your iPhone, go to Settings > General > Reset > Reset Location & Privacy.

Reconnect your iPhone to your computer and launch iTunes. When the "Trust This Computer" alert appears, select Trust or Yes.

Hello.
I followed the procedure you suggest, but the problem is not resolved.
This issue has existed since an iTunes update made this year or last year (I don't remember when it was).
It seems to me that iTunes (Apple) is increasingly restricting the freedom of action of its customers: in the past, I could freely manage the updating of my apps, the backup of my notes, the content of my apps, all possibilities that Apple has greatly restricted to my detriment.

Thank you for your response.
I followed the procedure you suggested, but the result was worse: I still couldn't see my files in the applications (particularly in OfficeSuite Pro), and the presentation of my applications on iTunes was very poor.