how would you know if your device has already been compromised and if so would the updates correct the issue or are other steps needed as well?

Apple ID Compromised?

Signs your Apple ID has been compromised

You receive a confirmation email from Apple that your Apple ID password was changed or your account information was updated, but you don't remember making any changes. Your device was locked or placed in Lost Mode by someone other than you.

If you think your Apple ID has been compromised

Device Compromised? Not possible.

1. Enable  Guided Access before handing over an iPhone to kids
2. Don't share Apple IDs
3. Don't Jailbreak
4. Don't share sensitive information pertaining to your device and payment methods
5. Beware of Phishing