How do I share one folder on iCloud Drive

Question

Me and my wife have different AppleID. We are going paperless and want to share one folder either on my or her iCloud Drive.
Using a mutual Dropbox account today but want to be inside Apples ECO-system.
Called Apple and they told me not possible. Are they correct?

Answer 1

AsI said - you have to open the application folders and delete the documents  inside - for each folder separately. And wait for these changes to sync.
The folders themselves cannot be deleted, only their content.
The iCloud setting for the applications are device specific. If you enabled an app for iCloud on any device, you will see the application collection in iCloud, even if you disable it on other devices.
If one disables the apps in the iCoud System Preferences, their folders disappear in the finder but are still in the cloud -- and there is a big pile of other garbage.
First delete the documents in the folders, until they are empty on iCloud, then hide the folders on your devices by disabling the app in the "Manage my storage" iCloud preferences.
I want to reliably delete ALL data (including any folders or metadata Apple lets us not see) -- a complete reset for iCloud Drive
You can only delete documents you move to iCloud drive, not Apple's maintenance files.
And you can only reset each device individually, that is using iCloud Drive, by disabling iCloud Drive, rebooting, signing in again. But you cannot reset the central storage in iCloud.
- and there is a big pile of other garbage.
What kind of other garbage, beside the application collections?