Permanently remove deleted files on iCloud.com
On iCloud.com, you can immediately and permanently remove files you have deleted from iCloud Drive within the last 30 days.
In iCloud Drive on iCloud.com, tap Recently Deleted in the sidebar.
If you do not see the sidebar, tap in the top left-hand corner.
Do one of the following:
Delete some items: Tap , choose Select, select the items you want to delete, then tap Delete at the bottom of the screen.
Delete all items: tap Delete All at the bottom of the screen.
To go back to your other files, tap another option in the sidebar, such as Recents or Browse.