No, it's not.
If you don't know "what teens are into these days" you can't write relatable characters of that age group at all - unless by "relatable" you mean "characters that middle-aged viewers can relate to as hypothetical young people they don't know much about."
As I said, a show 1,000+ years in the future shouldn't reference contemporary pop culture trends...at all.
I mean, did Harry Potter reference pop culture? Did The Hunger Games? Both were massively popular with young audiences, were thought to have relatable young characters, and were written by middle-aged women.