In Java, armadillo's generation is determined by the tag

{   "values": [     "#minecraft:animals_spawnable_on",     "#minecraft:terracotta",     "minecraft:red_sand",     "minecraft:coarse_dirt"   ] }

The terracotta contains all the dyed terracotta in java, but not in the bedrock.

        "minecraft:spawns_on_block_filter": [
          { "name": "minecraft:grass" },
          // Badland Terracotta Blocks
          { "name": "minecraft:brown_terracotta" },
          { "name": "minecraft:hardened_clay" },
          { "name": "minecraft:orange_terracotta" },
          { "name": "minecraft:light_gray_terracotta" },
          { "name": "minecraft:red_terracotta" },
          { "name": "minecraft:white_terracotta" },
          { "name": "minecraft:yellow_terracotta" },
          { "name": "minecraft:sand", "states":

{ "sand_type": "red" }

},
          { "name": "minecraft:dirt", "states":

{ "dirt_type": "coarse" }

}
        ],