"small chest room", "large chest room" and "mushroom farm room" never do loot in chest on woodland mansion
looked all chest in woodland mansion first floor room but "small chest room", "large chest room" and "mushroom farm room" are not do loot bc = (because) they are empty chest but another chest room are still fine
1: enter seed "ville" and create world (1.18 only or turn on cave and cliffs)
2: do /tp @s -37928 100 -27848
3: look chest 3 rooms on first floor room.