Oaks Minimap for neo-forge 1.21.1 Just Released
Bushy Grass is really no different to regular grass, it has the exact same loot-table and is biome inside 'c:is_forest' biomes. its also apart of the 'minecraft:grass' tag.
Thick Grass is a special type of grass that when walked in, increases the players movements speed slightly, which can come in handy when running from mobs early game. This grass generates in any biome in the overworld.
Dry Grass is another type of grass that generates near and around sand and in dry biomes tagged 'forge:is_sandy' biomes. its also apart of the 'minecraft:grass' tag.