Permanently remove deleted files on iCloud.com
On iCloud.com, you can immediately and permanently remove files you deleted from iCloud Drive within the last 30 days.
In iCloud Drive on iCloud.com, tap Recently Deleted in the sidebar.
If you don’t see the sidebar, tap in the top-left corner.
Do one of the following:
Delete some items: Tap , select the items you want to delete, then tap Delete.
Delete all items: Tap Delete All.