When I tested for Piglins' trading things, I found a problem: The recipes of chest and bowl unlocked as I got ONE soul sand from a Piglin.
In the attachment, you can see that my recipe book contained recipes of chest, bowl and fletching table (which needs flint to unlock), no any more wooden things.
The chest recipe is unlocked by having at least 10 non-empty inventory slots. The bowl recipe is unlocked by getting mushrooms.