Spyware detection

there are malware scanning apps on app store but would not really the see

point, on a non jailbroken phone the only way one can install new software of any kind is from app store,

if somebody found a way the apple would be working as quick as possible making a patch that would block whatever

security hole that made that possible, and the sandboxed nature of ios App Sandbox | Apple Developer Documentation

than I don't see how the add ware scanning app would be allowed to access or delete code outside it's sandbox

App security overview - Apple Support

Phishing is a problem and not real spyware or stuff installed on ios device, in that case the user itself is the security hole

Identify legitimate emails from the App Store or iTunes Store - Apple Support

and

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

and

Phishing - Wikipedia

and of cause

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

Your iPhone cannot get hacked unless jailbroken.

No, it wouldn’t work. Your phone cannot be hacked unless jailbroken.