SoftBank would want cash, they need to reduce their debt load , that’s pretty much they are considering this price in the first place

Fortunately there's a market for stocks.

There is no easy for market for 32b of any stock . You cannot just make sell order for that qty and expect that Order to be filled.

That stock market is also there for ARM stocks . There is no need to trade for nvidia shares at an undesirable price if there is no immediate cash in it.

Nvidia could potentially raise money from an FPO or similar instruments and leverage advantageous stock price they have, I.e. issue lesser newer stock than they would have at a lower price ,but only way SoftBank will consider a deal is if they get cash

There actually is. For example - on the last annual Berkshire shareholders meeting Buffett was talking about how easy it was for them to unload billions worth of airlines, 100% of their holding.

On a typical single day $4B worth of NVIDA stock is traded.

Sure you can, someone will buy that $32B in nVidia stock for $20B. Which is still more than ARM is worth.