In concentrated pools, Liquidity Providers can define a price range. Let's LP provides 1 million tokenA (maybe usdt) and 2 millions of tokenB. price of tokenB is 0.5 dollars. If Liquidity Provider defines "0.25-0.75" price range, that means if someone buys up all tokenB, the price of tokenB will be 0.75 dollars.
If there is no more tokenB in the pool, that means there is no more liquidity. What happens in this case? Does the pool still exist?