Veil for women is the main focus, and what women can say. (Also anything that is Islamic/Sharia) like alcohol, mingling or men and women.
Morality police really formed in early 1990s.
Iranians also have been using apps to notify each other where the checkpoints are set up where they check for moral clothing use.
Iranian protests (began in September, several hundred have died so far in multiple protest events) are still making headlines.
Other countries have similar things. "Any country where you have strict codes of behavior enforced ... [Saudi Arabia although it has eased restrictions for women over recent years], Sudan, Malaysia. Enforcing public order sometimes.