This is the NEEWER PA023: a nifty iPhone 15 Pro accessory that helps you do more with your smartphone camera. It has a 67mm filter adapter and 17mm lens mount. It has two cold shoe mounts and 12 x 1/4″ threads, so you can attach your microphones, lights, tripod, and everything in between.
You can use the lens mount to attach a 10x wide angle, 8mm fisheye, or a 300x microscope lens. This iPhone filmmaking cage has a CNC machined aluminum alloy construction. You can find out more about it here.