Wanted to know if hijab is wajib or optional for ladies after menopause or after a certain age such as 60 for example?

Hijab is still wajeb but when a woman becomes old and is not really at an age to get married or be looked at for marriage, then they can be flexible with their hijab. So if some of their hair shows or arm shows it’s ok. But it doesn’t mean they can go out completely without any hijab.