Nrop Dlihcrar 2021 Top -

That yields: — and adding "2021 top" from your subject after reversing:

Subcultures became mainstream, leading to the rise of hyper-specific keywords and specialized media archives. nrop dlihcrar 2021 top

Reversed, it reads: — but that still doesn’t make immediate sense. Let me reverse the whole phrase properly: That yields: — and adding "2021 top" from