I want to know if my iPhone is hacked

Why do you think it could be? Is there something happening that makes you think it is compromised? If yes, describe what exactly is happening and we might be able to help.

No, it is not hacked unless you (or someone with physical access to your device) decided to install unauthorised modification (most commonly know as jailbreak) on your device.

Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issues

https://support.apple.com/en-us/HT201954

Why do you think your phone is hacked?

If you received any message pop-up claiming this, it is a scam.

Start Here:

Recognise and avoid phishing messages, phony support calls and other scams – Apple Support

If you think your Apple ID has been compromised - Apple Support