Ah, I think I understand.
Are you syncing the vault to Google Drive via the builtin Enpass capability to sync to Google Drive?
I don't believe this is an Enpass issue. Google Drive makes connected app data hidden, https://developers.google.com/drive/api/v3/appdata , "This folder is only accessible by your application and its contents are hidden from the user and from other Drive apps",
I just setup a test vault and yeah nothing. So this would not likely work with Google Drive the way you'd like to share it, but its Google that has this behavior not Enpass.
That being said, the vault can be placed on Google Drive manually by either uploading a backup from Enpass, or changing the default Enpass vault location to a folder that's synced on your computer with Google Drive, those then could be shared via regular sharing methods.