According to @buFFalo94 over in the most popular Point Light Shadows [forum thread]( URP Point Light Shadows page-2#post-6599890):
(I haven’t tried it myself.) But cloning the graphics repository and setting it up as a package is a bit of a pain. Since the Point Light Shadows pull request was merged just a short while ago, it’s probably going to be available in 2021.1 at some stage, but I don’t believe there’s any available supported preview package that can be easily accessed through the package manager at the moment.