How to see if your system services has been hacked

Unless you let someone have physical access to the iPhone for an extended period of time, or somebody else knows your Apple ID password, then it can neither be hacked, nor tracked. There is no known way of remotely hacking an iPhone, and the only way to track it, would be to log in to your Apple ID on some other device and use the Find My app.

You can check in Settings->Account (top of settings), what devices your Apple ID is logged in to. As long as you recognize all devices listed there, then nobody would be tracking you or hacking the iPhone.

Thanks!