You can find the high-resolution files at these major wallpaper hubs:
Hosts a 5760x3240 Gohan from DBS version by multiple artists. 5760x3240 Wallpaper Mystic Gohan, Dragon Ball S...
Gohan's Ultra Instinct in Stunning 4K Ultra HD Wallpaper | 5760x3240 Wallpaper Abyss - Alpha Coders You can find the high-resolution files at these