like the ones in mincraft, well, the answer is yes, they could start growing in spring, and die away from cold in winter, but they need enrgy, this energy is transported by mycelium networks, but where does it come from? well, other forests, maybe animals, etc, this problem i have not been able to solve, maybe they evolved some kind of chlorophyl? or eat the poop of insects and other animals?, another thing would be the growthrate, which is very plausible, as seen in other mushroom, the stability can change depending on what the networks feed the mushroom, also, it would more likely be a hivemind of mushrooms
or not so big a mushroom, yes to, but these would need other compounds an example could be in https://criticalconcrete.com/building-with-mushrooms/ , here it gives an example of heat insulator, so the mushroom can trap the heat inside itself and survive