what if I erase my device and then find it?
I forgot my passcode on my iPad Mini and a friend was trying to help me. He deleted my device from account and just left me with the iPad.....GRRRR
Restore it from a backup.
Restore your iPhone, iPad, or iPod touch from a backup - https://support.apple.com/HT204184
Restore your iPhone or iPad from a backup [Apple YouTube video]
https://www.youtube.com/watch?v=Jbp3gGTQygg
About missing information after you restore your iOS device with iCloud Backup