NR NTN onboard a Cubesat is an interesting proposition. The Cubesat would have to be able to deliver the power required for a wide-band communication system to work. My impression is that this may be hard to do, but perhaps a use-case could be having cubesats delivering individual “beams/cells” that provide connectivity – in comparison to larger satellites, which may project many beams. IoT NTN is narrow-band and less expensive power-wise, it may be a better fit for especially smaller Cubesats.