This stand is specifically designed for the iPhone 16 Pro but you can certainly use any phone. On mine I have machined a rod out of 6061 Aluminum to assemble the bottom and top piece but I will provide a 3D printable one if you don't have access to a lathe machine. 

If you choose to machine the rod out of Aluminum turn it down to the nominal diameter in the drawing and test the fit. If it's too tight use sandpaper to get it down to size. The diameter you will end up with may vary considering the filament used to make the base.