Is it still fantasy when your sword-wielding mutants are based on science?

I'm writing a portal fantasy adventure that is all based on science, including the mysterious transportation to another world. Some of the characters have special abilities like wings. The other world is post-apocalyptic, so it had some technology but now has minimal transport, swords and knives, patchy electricity, and lots of dangerous indigenous life. Any idea what the genre would be? Would people hate me if they find no magic when reading the book if I call it fantasy?

Alos, I considered YA/NA since the protagonist starts out as 18 but the book spans 12 years (though her body cannot age). The themes are mostly suitable for YA/NA audiences so can it still be categorized as that?