Best way to see a map of a minecraft seed?

to double check a spot in game, make a copy of the world with cheats on and use /locate. /locate structure village_plains or /locate biome mushroom_fields gives you coords for the nearest one. do it on the copy so the real save stays clean.

chunkbase seed map is what most people use. paste the seed, pick java or bedrock and the version (1.21 is there), and it draws the biomes plus villages and other structures. you can highlight mushroom fields from the biome list. pick the right edition, terrain mostly matches between java and bedrock now but structure spots don't.