Question on how Kalshi handles illiquidity

Let’s say there’s a market at 50/50 at the start and there’s 100k participants split right down the middle. Let’s say later on that the “Yes” market hits 75% and “No” hits 25%. At this point, everyone on the “No” side decides to sell. Does Kalshi work based on a supply and demand algorithm so this would send the “No” side to basically 0% and you can’t sell at 25% unless you’re amongst the first to do so? Meaning you need actual buyers to sell to or are there market makers in between to cover these gaps?