Hi,
You have a free app named "Attachment INBOX" - https://forums.androidcentral.com/e...tails?id=com.igates.inbox.free&token=BlOpuAdj
This app center you all your attachments and provides a great search engine for your attachment
Including filtering by type and search result ordering by: date, type, size, name
I test it only on Exchange Outlook on my phone and even if I only preview attachments , I can see them in Inbox app.