Mods for 1.21.8
8 mods match your filters.
The Economy API for Fabric.
Colored Bricks: many different variants of each bricks for blocks, stairs, slabs, walls, fence & fence gates. 16+ new colors for your Minecraft buildings and decorations
EcoBal is a Economy API for fabric mods.
Crafting Recipes & Villager Trades boost for Superflat Survival (Fishing, Mob Loot, Trading, Villages, Chinese and Desert Sellers & etc)
Simple mod wich adds more recipes for your gameplay with create mod
EcoMobs pays money for killing mobs and animals. Uses EcoBal Economy API
Replacing the "Crates + Keys" with "Bundle Items + Right Click" And a user friendly item / command / kit gui setup ingame!
Restricting villager trading. Fully configurable via Mod Menu with per-profession whitelisting.