I have a folder with 5 items stored in the iCloud Drive app on my iPhone. I am trying to send an email from my phone that will include the folder - my options only seem to be to send 5 separate emails ......??
I don't think you can email an entire folder without somehow archiving it first. Try Winzip for iOS and see if that works for you. It's free on the app store.
The other person receiving the attachment may need to also have the app to open the file.
On a Mac, you could go to Finder/iCloud Drive, select the folder and then chose Share. Sharing by email is one of the options. I have not tried this, but may be an option.
Press the screen and hold , you get a bar popping up select add attachment select the file from the folder and hit done then repeat the process for the next file and do the same for the remaining 3 files , job done on one email