Surveillance folder found in my iCloud

at least now you provided some context.

At some point an app called surveillance was installed on your device. It has since been deleted. It used iCloud to store its data and that data is still there.

if you check your app purchase history you should see this app and maybe more about it.

bittom line is you or someone with full control of your device put that folder there.

Without knowing what a 'surveillance" folder might be, we have no way of knowing.

This isn’t helpful. I found these folders myself. I will be sure to send this to every iPhone user I know. Upon searching for this I only found this thread. How is this not bigger news??