I'm from South Spain and here are living a lot of muslim immigrants. As you say, a lot of women which cover their hair and others not. Normally they cover their hair when they are married. But same asin some other countries, it's their decision, because religion or tradition to do it, when nobody is forcing to do it by drastic laws, like in some islamic theocracies where they don't have a choice.

In Iran the law was recently paused and because of this, naturally some women don't wear the hijab, but in other countries they are even forced to wear an burka without any liberty of choice. As said, it's different to have a choice or to be forced by others.

Iran has paused the implementation of a new, stricter law requiring women to wear the hijab, an official said, with many observers believing that the bill could have sparked mass protests similar to those that erupted after the 2022 death of Mahsa Amini.

The controversial law, approved by Iran’s parliament in September 2023, will not be sent to the government this week as planned, according to Shahram Dabiri, vice president in charge of parliamentary affairs. The development effectively means that Iran has halted enacting the legislation.

https://www.euronews.com/2024/12/18/iran-pauses-implementation-of-stricter-hijab-law-for-women

Yes, I understand perfectly, but it isn't the same. I know that society, fashion and other influences can push a women th use some clothings, but she isn't really forced by law to do it, she always has the choice, it's different in countries where a women is drastically punished if she don't wear a hijab or even a burka, even if she don't want to wear it. Sorry if YOU don't see the difference.