Dr Antivirus

You can't have something that has yet to exist in macOS. There are lots of Trojans out there, of which not a single AV software package will stop you from installing.

Since you say it's from Apple, I presume you mean you got it through the App Store. Anything there is neither sold by, or endorsed by Apple. They exist solely because they passed the necessary rules to allow inclusion. Not a single piece of software in the App Store that claims to be anti-virus is worth one cent of your money or time, and can't do what they claim. This also applies to any AV software outside of the App Store. Such as Avast, Symantec, whatever. They are all 100% useless.

I highly doubt this app found anything, other than lots of false positives. Unless it found lots of adware and incorrectly classified them as a virus. But I doubt it. And it ran for a full day?!! Get rid of this junk!

If you want to try something that is actually useful at detecting junk you may have installed, use MalwareBytes for Mac.

Malwarebytes for Mac — Mac Antivirus Replacement | Malwarebytes

You shouldn't be using Dr. Antivirus. It has been removed from the App Store. See:

Mac App Store apps are stealing user data

It's not in the App Store. I provided a link.