1) DPRK hasn’t even demonstrated the ability to launch an ICBM without a warhead.
2) Even if they had, they’d still have to demonstrate the ability to launch an ICBM with a warhead.
3) Even if they had, they’d still have to demonstrate the ability to miniaturize their nuclear weapons enough to have nuclear warheads for their ICBMs.
4) Even if they had, launching a nuclear ICBM is easier than launching a nuclear satellite; ICBMs are on suborbital trajectories, which are lower energy than orbital trajectories.
5) AEGIS has already been demonstrated to have the ability to shoot satellites out of low-Earth orbit. If the US suspected that the DPRK might be up to something like that, they would shoot it out of the sky. And any and all DPRK satellites regardless of purpose would be expected to be shot down simultaneous with the US launching a first strike.
But it s easier to orbit a satellite than to bull’s eye a target with an ICBM.