as I know that fungus(mushroom) is an organism that can be found anywhere. But is there any endemic fungus that can only be found in one place and cannot live in any other place?
There is a nice example of endemism, and it is about the most expensive and appreciated fungus! Ophiocordyceps sinensis, growing at the Tibetan Plateau above 3000 meters altitude. This fungus (Ascomycota, Hypocreales) is a parasite of several species of ghost moth larvae, and some people even kill to get them! It is supposed to have bioactive compounds, including anti-cancer, anti-fatigue, hypoglycaemic, etc., and is used also as an aphrodisiac in the Chinese tradition. It can be sold for up to US$18,000/Kg.