player can't use debug stick on every block. Owing to this fact player can't "dupe" items like: cactus, bonemeal, kelp, sugarcane and every food that you can plant.
List of all excluded blocks:

"COMPOSTER", "CACTUS", "KELP", "SUGAR_CANE", "GRASS_BLOCK", "ACACIA_LEAVES", "AZALEA_LEAVES","BIRCH_LEAVES","DARK_OAK_LEAVES","FLOWERING_AZALEA_LEAVES","JUNGLE_LEAVES","MANGROVE_LEAVES","OAK_LEAVES","SPRUCE_LEAVES", "BIG_DRIPLEAF", "BIG_DRIPLEAF_STEM","CHORUS_FLOWER", "CHORUS_FRUIT", "CHORUS_PLANT", "SEA_PICKLE","RESPAWN_ANCHOR", "ACACIA_TRAPDOOR", "AZALEA_TRAPDOOR","BIRCH_TRAPDOOR","DARK_OAK_TRAPDOOR","FLOWERING_AZALEA_TRAPDOOR","JUNGLE_TRAPDOOR","MANGROVE_TRAPDOOR","OAK_TRAPDOOR","SPRUCE_TRAPDOOR", "WARPED_TRAPDOOR", "CRIMSON_TRAPDOOR","TRIPWIRE_HOOK", "TURTLE_EGG", "BEE_NEST", "BEEHIVE", "CAKE","SWEET_BERRY_BUSH","BEETROOT_SEEDS", "MELON_SEEDS", "PUMPKIN_SEEDS", "WHEAT_SEEDS", "CHEST", "END_PORTAL_FRAME", "END_PORTAL", "PISTON", "PISTON_HEAD", "SNOW"