If you live in Iran or watch Iranian daily life in streets, you notice there are many girls whose hijab is way lower than Russian official, yet government tolerates them.
so there is no double standard.
Raeesi also didn't meet with that Russian girl.
Iran also recommends softly, first of all, there are very very very low amount of encounters, in most cases, police just talks with them and releases them few minutes later, and in serious cases which are very rare, police transfers them to it's station and they have to participate in a classroom.
nonetheless, each country has it's own dress code.
We don't want to become rapestan!