Keynote

Delete or recover a presentation in Keynote for iCloud
If you want to reduce the amount of iCloud storage space you’re using or no longer need a presentation (or folder), you can delete it. If you change your mind, you can get back (recover) deleted items within 30 days.
Important: When you delete a presentation in Keynote for iCloud, it’s also deleted from Keynote on all your devices set up to use iCloud. If you delete a presentation you shared with others, it’s no longer available to the people you shared it with.