The New 1.22 Blocks and Items are named "item.insert_here.name

The New Leaf Litter, Wildflowers, Bush, Firefly Bush, Cactus Flower, Short Dry Grass, Tall Dry Grass, Brown Egg, and Blue Egg are named tile.leaf_litter.name, tile.wildflowers.name, tile.bush.name, tile.firefly_bush.name, tile.cactus_flower.name, tile.short_dry_grass.name, tile.tall_dry_grass.name, tile.brown_egg.name, and tile.blue_egg.name, much like the “tile.moving_piston.name” which makes them “Unknown blocks” but easily obtainable