The article seems quite speculative.
I'm sure the Iranian regime would live to jam starlink, but i don't think we have any ability to know what is actually happening here.
The article claims 80% packetloss. That's still 1 in 5 packets getting through. That is annoying but not going to stop information getting out.
I also wonder, if all other coms are cut off, is it possible star link in the country is just overloaded?
In my experience 80% packet loss makes most common protocols basically unusable. Yes you can still get data out...but many apps will just fail due to timeouts and other things.