Plenty old to have done things that still matter. By that age Audrey Hepburn was carrying messages for the Dutch resistance past the armed Nazi occupiers! Soros in contrast signed on with the Nazis to help them locate and loot hidden Jewish treasure. A bit more active help than the similarly aged girl now under trial per the source for just doing clerical work at a concentration camp.
Of course there is much he's done since the war that remains unpunished. Allegedly his US citizenship application was fraudulent back in the 50s. He's caused Billions of dollars in intentional damage to multiple countries via manipulating their currency for his profit. If those thefts aren't serious crimes they ought to be. A few years back he gifted $18 Billion to the (undeservingly) tax free non-profit fund he now, and his heirs going forward, controls to push his agenda. I wonder how much he tax he paid on that transaction. I don't know but would guess zilch. At a decent tax rate we could afford to reopen Alcatraz and put him in Capone's old cell. Although I'd grant the Brits primacy if they'd really send 007 to finish him.
We know about Soros as an adult but as a WWII Nazi war criminal, no.
Soros was 13 during the D-Day invasions.