Question about the anime

Something that’s always puzzled me about Yu Yu Hakusho is what happened to Gouki after his defeat. Unlike Kurama and Hiei, who both returned and played major roles in the series, Gouki just disappeared without a trace. Given that all three were working together at the start, it feels odd that he was the only one who never came back. Was he just forgotten by the story, or is there a reason he didn’t return? Do you think he was permanently dealt with, or could he have been lurking somewhere off-screen? I’d love to hear any theories or insights!