New items come out and instantly become completely irrelevant in villager trading because it's ignored by developers. They also overlooked some obvious trades from old items too when they added new professions.
Farmer
Add a Beetroot for Emerald trade
Add Poisonous Potatoes (3-8) for Splash Potion of Poison trade
Add Bucket of Water for Emerald trade
Fisherman
Add a buy Prismarine Block trade
Add a buy Sea Lantern trade
Add a buy Pufferfish trade
Add Prismarine Shard (15-22) for Emerald trade
Add a Clownfish for Emerald trade
Fletcher
Add a buy Tipped Arrow of slowness trade
Add a Feathers (14-18) for Emerald trade
Add a buy random Tipped Arrow trade
Shepherd
Add a buy White Banner trade
Add a buy Black Banner trade
Add a buy Bed trade
Armorer
Add a buy Armor Stand trade
Add a buy Shield trade (with possibility of having random pattern?)
New items come out and instantly become completely irrelevant in villager trading because it's ignored by developers. They also overlooked some obvious trades from old items too when they added new professions.
Farmer
Add a Beetroot for Emerald trade
Add Poisonous Potatoes (3-8) for Splash Potion of Poison trade
Add Bucket of Water for Emerald trade
Fisherman
Add a buy Prismarine Block trade
Add a buy Sea Lantern trade
Add a buy Pufferfish trade
Add Prismarine Shard (15-22) for Emerald trade
Add a Clownfish for Emerald trade
Fletcher
Add a buy Tipped Arrow of slowness trade
Add a Feathers (14-18) for Emerald trade
Add a buy random Tipped Arrow trade
Shepherd
Add a buy White Banner trade
Add a buy Black Banner trade
Add a buy Bed trade
Armorer
Add a buy Armor Stand trade
Add a buy Shield trade (with possibility of having random pattern?)
Add Bucket of Lava for Emerald trade
Leatherworker
Add a buy Item Frame trade
Add a Rabbit Hide for Emerald trade
Butcher
Add a Raw Mutton trade for Emerald trade
Add a Raw Rabbit trade for Emerald trade
Cleric
Add Spider Edd for Emerald trade
**New Brown coat Profession**
Florist
Tier 1
Buys String (15-20) for Emerald
Buys Bone Meal (36-40) for Emerald
Sells Flower Pot (1-3) for Emerald
Tier 2
Buys Fern (15-19) for Emerald
Buys Cactus (15-21) for Emerald
Sells Sunflower (1-3) for Emerald
Sells Lilac (1-3) for Emerald
Sells Peony (1-3) for Emerald
Tier 3
Buys Poppy (36-40) for Emerald
Buys Chorus Plant (16-24) for Emerald
Sells Orange Tulip (1-3) for Emerald
Sells Pink Tulip (1-3) for Emerald
Sells White Tulip (1-3) for Emerald