A. Look at incentives, Musk gets massive blowback from this, gains literally nothing from it. Trump does gain from this, and does have control over Starshield and specifically how Starlink is used in Ukraine.

B. There's plenty of reporting that the White House gave the order:

https://www.reuters.com/world/europe/order-limit-starshield-...

>Order to limit Starshield for Ukraine came from inside White House, sources say