Passkeys site-specific hacks
is this important to have on? Should I enable it for security against a hacker?
is this important to have on? Should I enable it for security against a hacker?
Keep the iPhone updated to the latest iOS always and never Jailbreak. That's it.
iOS / iPadOS devices cannot be hacked or infected with Virus / Malware / Spyware unless you have intentionally downloaded spurious software or unauthorized apps directly from the internet and installed them on your device or/and have Jailbroken.
It (Hacking) also depends on how careful you are in sharing sensitive and valuable information pertaining to your iPhone such as Passcode, Password, etc with your friends and family members.
Be judicious when sharing the device's sensitive and valuable information with friends and family members.

If you don't reckon what is said above is true then you have two options...
If you feel an unauthorized person/app is remotely using, controlling or monitoring your device, then that is possible only if you have done one or more of the following Don'ts...
If one of the above is true then quickly change the Apple ID Password and Return iPhone settings to their defaults.

Seems like we can’t get a straight answer on this one! So I’m guessing it’s a no go for me. I’m having same problem and I’m not crazy I know when something is going on with my phone.
Passkeys site-specific hacks