Cant get sky with sun and clouds in new Dimension?

Super new to modding and just playing around with creating new dimensions but cant seem to a proper sky with sun, moon and cloud. Only showing plain sky with fog color. Even tried strtaight up duplicating the overworld but still with no successany. No idea what I'm missing?

public class PurgatoryModDimension extends ModDimension {
    @Override
    public BiFunction<World, DimensionType, ? extends Dimension> getFactory() {
        return PurgatoryDimension::new;
    }
}
      
 ///////////////////////////////////////////////////////////////////////////////////////    
public class PurgatoryDimension extends OverworldDimension {

    public PurgatoryDimension(World world, DimensionType dimType) {
        super(world, dimType);

    }
  
  	@Override
    public boolean isSurfaceWorld() {
        return false;
    }
  
}


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@Mod.EventBusSubscriber(modid= LukesMod.MOD_ID, bus= Mod.EventBusSubscriber.Bus.FORGE)
public class ForgeEventBusSubscriber {

    @SubscribeEvent
    public static void registerDimensions(final RegisterDimensionsEvent event){
        if(DimensionType.byName(LukesMod.PURGATORY_DIM_TYPE) == null)
        {
            DimensionManager.registerDimension(LukesMod.PURGATORY_DIM_TYPE, RegistryHandler.PURGATORY_DIM.get(), null , true);
        }
    }
}