A leak was found on Train a while ago suggesting Lake may come just after Train. Since Cobblestone "Winter" leaks were found in game files, and Season 3 is close to ending, Lake might reappear alongside Cobblestone this winter.
Maybe Cache could reappear as well, since Valve liked a message about it on X, but Valve did not create the map, so it takes more time.
Until then, we will have to have faith and praise the merciful Lord Gaben!