Keep in mind a lot of the Starmaker CGs are manually edited by hand, and there has never been any insight into the actual workflow. So it is all guessing. When it comes to things like this we have no idea how much is controlled by LoRas, add-ons and configurations or how much is manually edited.
A quick fix would be to use something like ComfyUI-IC-Light (or the official IC-Light nodes, search “IC-Light ComfyUI” on GitHub or ComfyUI Manager)
Though personally I prefer to do all my lighting, levels and blur in Photoshop cause it gives much better control.