You could make a package for it locally but it’s easier to add it to nixpkgs libsForQt5.qtquick3d: init by Artturin · Pull Request #308874 · NixOS/nixpkgs · GitHub
If you need help finding the rest of those .so files you can use GitHub - nix-community/nix-index: Quickly locate nix packages with specific files [maintainers=@bennofs @figsoda @raitobezarius]