Two questions here.
1) Via app, attachments are saved in sharepoint list under respective PDN. If I double click one of the PDN's in sharepoint, I can see a list of attached files with random names. I am wondering if we can download all attachments for all PDNs (or selected PDNs).
2) When attachments are saved, can we name the attachment file name to PDN + PO No.? For example, if we upload two files like attached image, the file names will be like 02-001044_95750 and 02-001044_95750(1).
Sorry - After researching the first request, it is not possible to download multiple attachments at the same time in PowerApps. You can launch the attachments in different windows using Launch() if that is helpful to you?
For the second request, you need to use Power Automate to rename the files and add them to Sharepoint List. Please see this video: https://www.youtube.com/watch?v=Pa-pYEkLH-U