iPhone 11 possibly hacked.

I just received an email (which I’m sure is a scam) of threats that malware has been Downloaded into my phone and they have access to my private information and photos and going to distribute them blah blah..as much as I’m convinced it’s BS I am Still slightly concerned of the possibility of an outside source getting access to my camera and wanting to know if there are anti-Malware Software or apps recommended specifically for Apple iPhones. (11) or are they protected from such viruses?