Thanks for that info and choosing the Apple Support Communities. It sounds like you want to free up storage in your iCloud account and based on your screenshot it appears you have documents taking up space. To help free up this space, please follow these steps:
iCloud Drive
You can manage and delete files you store in iCloud Drive from your iPhone, iPad, iPod touch, Mac, or Windows PC.
With iOS 11 or later, files that you delete from iCloud Drive remain in Recently Deleted for 30 days before they are removed from your device.
iPhone, iPad, or iPod touch
You can use these steps to manage your files from your iPhone, iPad, or iPod touch:
iOS 11 or later:
- Go to the Files app and tap Browse.
- Under Locations, tap iCloud Drive > Select.
- Choose the files that you want to delete, then tap .
- Go to Locations > Recently Deleted > Select.
- Choose the files that you want to delete.
- Tap Delete.
iOS 10.3 or earlier:
- Go to the iCloud Drive app.
- Tap Select.
- Choose the files that you want to delete.
- Tap Delete > Delete from iCloud Drive.
Manage your iCloud storage
Cheers!