How to get woodland mansion map
Solution 1:
A woodland mansion map. In order to get this you need to trade with an expert level cartographer,but there is only a chance the villager offers this trade. If you don't have one just know that they spawn in dark forest, a biomes with spruce trees and mushroom trees. If you just can't find it you can use chunkbase.com and use their woodland mansion finder. It's pretty helpful to find those mansions.