Minecraft bedrock custom biome not generating

I've recently tryed making custom biomes in Minecraft bedrock edition and idk why something doesn't work for me. The biome that i made exist in game because i could see it's name when i pressed tab after typing /locate biome command. But after running the command there was always a message No biome can be found in this location. I try teleporting myself to diffrent locations but nothing work. So i guess that the biome just couldn't generate. If you have any ideas how to fix this please let me know.