It looks like there is a ridge in the cylinder but there really isn’t. Not one that you can catch with a finger nail. If I ran a hone in that cylinder what looks like a ridge would disappear fast and blend in with the rest of the cylinder. It’s mainly carbon on the cylinder wall.
That is correct. That is because it is a low-mileage teardown, probably about 10k miles. It likely would not need to be ridge-reamed. You would have to measure it to be sure. But, it was used in a high-performance application. Notice there are no crosshatch marks in the cylinder wall. They were worn away during break-in when the rings seated.