Do supercomputer get discovered? That’s new. Means the nature had built those once, it’s human’s task to find out their existence then learn how those are constructed and working. Supercomputer engineering superfluous; science and engineering quite in opposite. Made by nature, dynamic in its behavior, at same time non-organic that’s new too.
Not a computer. A conductor. A superconductor is a material, a chemical. Finding the right combination of elements to make a new material with specific properties is usually called a discovery. (As there are a finite number of elements, and a finite, though large, number of ways to combine them, especially for homogenous, non biological molecules.)
Designing a process to create that material would be an invention.