GPU Lightmass won't work with preview platform Android Vulkan

I have enabled all of the required settings and am wondering why bake light maps is still greyed out. Other preview settings work but I need it to be set to android vulkan mobile.
Any help on this is much appreciated

Using the Vulcan preview always disallow you to build lighting even with the regular lightmass bake. Also GPU use ray Tracing and it’s something that is not yet supported by Vulcan mobile I believe. But you should be fine by building your lighting with the regular preview mode and then turning the Vulcan preview on after your build finish.