Hacked phone ?

Hello there!

iOS / iPadOS devices cannot be infected with viruses / Malware / Spyware if it is updated to the latest iOS/iPadOS unless you have intentionally downloaded spurious software or unauthorized apps directly from the internet and installed on your device or/and have Jail Broken. 

It (Hacking) also depends on how careful are you in sharing sensitive and valuable information pertaining to your iPhone such as Passcode, Password, etc with your friends and family members.

Be careful when sharing the device's sensitive and valuable information with friends and family members.

Thumb Rules:

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

Leighton78 wrote:

How can you check if your phone has been hacked or cloned

You would need to have the device jailbroken, by someone who had physically had your phone with access to a computer.

What makes you think you've been hacked or cloned?