It looks like the study they linked only addresses the CO2 produced by the satellites, and not the land based providers.
Another interesting thing is that OneWeb and Kuiper (competing satellite internet services) are estimated to have significantly more per-user emissions than Starlink (40-200% more emissions!) (keep in mind that Starlink is predicted to have the most users) while also being estimated to provide a worse service and be more expensive per user. (all taken from the charts on page 6)
They also mention that Starship will likely lower carbon emissions of later Starlink launches significantly.
I’m not quite sure how the much larger Starlink V2 design factors in to all of this, or if they even took it into account.