Firstly the Screen Shot are from Safari 16.4 running Ventura 13.3.1(a) the latest Stable Version
Secondly, System Preference ceases to exist in Ventura as it has been rename System Setting
Thirdly - Some of the Fake Virus Alerts in above made so Website that has added itself to the Notification Aspect of Safari and refer back to original reply for details and locations
Fourthly - There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX Foundation and Permission Limitation.
Additionally, in macOS 11 Big Sur, macOS 12 Monterey and macOS 13 Ventura.
The Operating System resides in a Sealed and Read Only Volume that can not be opened by the User nor by Third Party Applications.
The only Entity that can open and modify or alter this Volume is Apple.
That would occur when a update or UpGrade is performed.
The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.
AntiVirus Developers purposefully Market their product to create a “ Fear Factor “. In so doing, creating a False Need for their Product.
The The Built in Security is all that is required to protect the computer.
There is Adware & Malware which will affect the computer and is generally downloaded from “ Shady “ Websites or Developers who Inject this software into the download.
Should “ Certain & Specific Software “ referenced from above be installed - it will negatively impact macOS. It is suggested, download directly from the Developer , the application Malwarebytes for Mac.
It is free or paid for added features.
Run the Application and it should remove the malware / adware. Once done, restart computer and test.