Can you recovered what deleted

"If you need to access a file that you deleted within the last 30 days, you can get it back from the Recently Deleted folder in the Files app, or on iCloud.com. After 30 days, your files are removed from Recently Deleted." --> iCloud Drive FAQ > How do I get back files that I deleted?hhttps://support.apple.com/HT201104#recentlydeleted

Phew, I am glad we narrowed down what it was you meant. ;-)

Sign into Find My on the device itself to add it. It has to be done from the device.

Set up Find My iPhone on all of your devices - https://support.apple.com/HT205362

Home screen > Settings > [your Apple ID] > iCloud > Find My > turn on/off

If you mean you erased the device and want to recover what is erased, restore it from a backup.

Restore your iPhone, iPad, or iPod touch from a backup - https://support.apple.com/HT204184