In the approved form needs to put attachments files for are see in another approved form.
I used the Repeating section because is easier to get URLs.
I don't any problems get URLs and update list field with those URLs.
For example, I get the URL <a href="https://intranet.coficab.com/preprod/Lists/Workflow%20Tasks/Attachments/203/Manual_Utilizador_BuildInstaller_V8_Windows.pdf">Manual_Utilizador_BuildInstaller_V8_Windows.pdf</a>
but in list or in body email don't appears like a link.
See attachment file
