I realised there's more to this article, but with notes like this: "Note this strategy assumes that the link from the ground to the UAV is somehow protected from an electronic attack by the jammer either through waveform design or by narrow beam antennas." you know they're not focusing on consumer level hardware.

Isn't starlink and most other LEO constellations ku, though?

Yes, C and Ku are dominant now, but not on LEO.

LEO is dominated by 400-500Mhz for milcom, L and C. Resurgence of Ku in LEO is mostly due to regulatory regime already being cleared for satellite internet due to previous entrants, and cheaper hardware for consumer market.