To start with, lead would easily melt over fire and that would be quick end of cooking.
Second, if its already there, how healthy do you think dishes would be if made on such pan? I'd say add a wound to all foods made on lead pan but it currently has no distincion of what materiał it is made from.
3rd, about lead in general. Maybe idea more for next world or if possible introduce antimonium to the game. Found on lvl1 for the the purpose of alloying it with lead. This alloy makes lead usable as quite hard materiał IRL, something obv lower than bronze, but still, could be new early hard metal. Or equivalent, to make more tinkers toys: anvil and Hammer, scythe, plow, saw