There is no longer support for LGPU from @Jimbohalo10. See the post 2500 about retirement.
There are NOT patches for LGPU 5.5, 5.6, 5.7. 5.8,5.9. 6.*
By download count, 5.3 was the best version with over >421 downloads and 200+ binary patches.
There have only been <30 requests for the later versions,
because a licence is needed to run UE5 from 5.4 onwards
Therefore, use the new Epic GPU Lightmass update, which is the plugin you loaded.
The updates for 5.6 onward and instructions are in the thread for this is