Answer
Yes, the 2020 documentary about Nasrin Sotoudeh was filmed secretly in Iran. The documentary, titled "Nasrin," was directed by Jafar Panahi, who was himself imprisoned in Iran for several years for his political activism. Panahi was able to film "Nasrin" using hidden cameras and smuggled footage out of the country. The documentary follows Sotoudeh's work as a human rights lawyer and her fight for women's rights in Iran.