Removing key note hackers with acces to phone

Do you mean the app Keynote?

If you do not want it, then delete it. There is no security risk having that app on your phone. You should be concerned that someone would have to know your Passcode in order to install the app. Follow this to change your Passcode.

Set a passcode on iPhone - Apple Support

Hi SHOnuff15

welcome to the Apple (user-to-user) Community!

Re: "Removing key note hackers with acces to phone :

Someone loaded key note on my phone to violate my privacy"

Am no expert on security, yet your post surely deserves some response.

Apple has many security details online, you might like to browse through the links below.

Eg: You can use Safety Check to check whom you’re sharing information with

With iOS 17: How Safety Check on iPhone works to keep you safe - Apple Support

There is also a website with info. online, about how to keep your Apple devices and data secure.

Eg: see: Privacy - Control - Apple

If needed: Apple says: "If you believe that you have discovered a security or privacy vulnerability in an Apple product, please report it to us." So you may want to: Report a security or privacy vulnerability - Apple Support

or

See how to change your password: If you think your Apple ID has been compromised - Apple Support

If you want more help, you can: Get help with security issues - Apple Support

Keep safe: Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

All the best :-)