A central value in bitcoin is that we don't tell each other what to do with each others money. There is absolutely no way on Earth to tell what coins are in cold storage and what coins are lost. So any attempt to "redistribute" coins will result in massive stealing and surely cause the collapse of bitcoin. I would sell off immediately if this happened and never touch bitcoin again.
There is also no reason whatsoever to do this and it addresses no problem. Bitcoin would work exactly the same way even if there were only 1 bitcoin. Or even less. The total production of BTC, 21million coins, is an arbitrary number and could have been 10 million or 100 million.  The coins that are now inaccessible are gone forever. Stop thinking about them, lol.