Mostly teenagers go for the Hijab fashion street style because they tend to wear western clothes and over that they wear Hijab. You must have noticed around you that a lot of people follow the western clothing style such as pants and shirts in different street style but still they wear Hijab because they know the importance. They dress themselves like normal fashion such as wearing a necklace or earrings with Hijab covering their head.
Hijab is an overall name for females covering their body but nowadays mostly females prefer to just cover their head completely because they have to step outside home due to school or work. Street style refers to as only covering your head with wearing a t shirt and pants. Many Muslim girls in Asian countries tend to follow the Hijab fashion street style because they think it suits them well and they would be good with that.