Hey Iranian here.

Iran's afinity to Islam is very very mixed. It really depends on the area and the family. There has been a major rise of liberalism here alongside calls for a secular democracy. Also a lot of younger people are " Shia Muslims" because their parents chose to put that in their ID when they were kids and changing religion from Islam to anything else is punishable by death.

This especially applies to big cities with a bunch fo internet and illegal VPN providers that can allow unrestricted internet access.