URP + VR + 3DGS runs two times faster with single-pass rendering!
The Unity package might be avaliable on Unity asset store soon, depending on their curation speed, but it is typically really slow.
In the meanwhile, you could purchase the shader pack here: https://payhip.com/b/eula1
I will keep a mailing list to send future updates (e.g. add more vfxs) for early buyers who do not purchase through Unity asset store.
If you have already purchased this asset, there is no need for an update. Simply follow this tutorial, the original package also supports URP+ Unity 6 + VR + Single pass rendering.
Thank you everyone for your support!