Well if RNA was a (necessary) precursor to DNA, some experiments that attempt to replicate aspects of a deep alkaline thermal vent have already been conducted - you can get, albeit very short, strings. But the obvious problem is in trying to replicate a chemical soup and structure under high pressure, that doesn't exist any longer, and then run experiments to try to replicate outcomes of a natural experiment that lasted hundreds of thousands of years.
The idea that DNA needs to be spontaneously generated in order for us to be confident that we understand how DNA came to be is misplaced.
The idea that DNA needs to be spontaneously generated in order for us to be confident that we understand how DNA came to be is misplaced.