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Adding custom biomes


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(Minecraft 1.18.1 Forge) In my mod that i am developing, i was able to register new biomes, using the same method to register items or blocks or enity or etc. Since I am registered and trying to generate a world with only one biome, I can view my biome, the world is generated correctly. But when I generate a world in the traditional method, the biome is not generated even if it is present in the list of biomes taken from the Locatebiome command.
I think I am missing something to have the biome spawn, but I don't know where to find it.

Init Biome Class

public class BiomeInit 
    public BiomeInit() {
    public static final DeferredRegister<Biome> BIOMES = DeferredRegister.create(ForgeRegistries.BIOMES, ImmortalObsidian.MOD_ID);
    public static final RegistryObject<Biome> SOBBY_FOREST = BIOMES.register("sobby_forest",
            ()-> OverworldBiomes.forest(true, true, true));
    public static final RegistryObject<Biome> SOBBY_END = BIOMES.register("sobby_planes",
            ()-> ImmortalObsidianBiomes.sobbyPlanes());

Main Class

public class ImmortalObsidian 
    public static final String MOD_ID = "immortalobsidian";
    public static final CreativeModeTab OBSDIAN_TAB = new CreativeModeTab(MOD_ID) {
        public ItemStack makeIcon() {
            return new ItemStack(Items.OBSIDIAN);
    public ImmortalObsidian()
        var bus = FMLJavaModLoadingContext.get().getModEventBus();


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