Well, you'd need the machines for that – there’s only a handful of companies able to build the EUV lithographic machines for that, most of them small German companies with a few dozen to hundred employees.
And they can’t just increase production.
In memory, smaller means less space to store your bits. I remember a quote from somewhere that with TLC at 20nm, you could lose only 1 ELECTRON PER YEAR from the floating gate to meet the memory retention spec.
Also, NAND had smaller feature sizes than logic for some time, before they really hit the wall. They innovated a lot of advanced techniques like quad patterning for memory cells. It helps in memory that you are optimizing for one and only one cell.
But the silicon factories cost billions each, so no-one is going to scale up because of a temporary shortage. The same, even more so, for the factory-factories.