Computers have yet to match many of the capabilities of the brain. Heck I have better image recognition when I’m drunk than all of Google’s image recognition nodes combined.

Could a computer host a human mind to its full capacity?

Did you forget that any technology publicly known and available is about 20 years old? Im sure they are systems that can recognize image faster and more accurate than humans but its sort of a “product” you wont find by googling.

I did not know this. I assumed certain technology is more advanced in private industry or classified governmental programs, but I was unaware that my iPhone X is effectively a 1997 device.

You can find research projects that haven't (yet) been commercialised. They exist only in prototype form that either isn't ready for mass production or isn't economically feasible. You see it all the time with things like memristors or the latest potential cure for cancer.

Sure, but integration of technologies is a technology itself. And, that too must then be 20 years old.

Sounds unlikely. Is there any evidence of this?

Then enslave the mind to do work, to pay the hosting bills.

They'd presumably already have any number of superior minds, able to be spun up in whatever quantity required.