Not too surprising, given that Starlink operates in Iran without a permit, "space pirate radio" style, and has something of a habit of making the access free when major protests happen and the government imposes a network blackout. Iranian government and Starlink have no love for each other, clearly.
It's a pattern by now: whenever a government wants to do something awful, it shuts down internet access - so that no one can hear it, see it or coordinate a response. And Starlink becomes a lifeline that the regime would rather people didn't have.
This is why all of those "national great firewalls" shouldn't exist in the first place. If you give a government a capability to restrict access to whatever it wants and enact a network blackout whenever it wants, it's a matter of time until it gets abused.