I would focus on just getting her to read anything to be honest! I think reading is one of those things that can be hard to start up again but once the momentum is going it’s easier to keep it going.
Some ideas of books that I found exciting / page turning / interesting as an older teen, or that my 15-16 year old nephew/niece are enjoying at the moment:
Becky Albertalli - The Simon series, Imogen Obviously, Kate in Waiting
Leigh Bardugo - Six of Crows duology, Shadow and Bone trilogy, King of Scars duology, Ninth House
Holly Black - The Folk of the Air series, Modern Faerie Tales series, The Darkest Part of the Forest
Alexandra Bracken - The Darkest Minds series, Lore, The Passenger series
Kiera Cass - The Selection series
Stephen Chbosky - Perks of being a Wallflower
Cassandra Clare - Mortal Instruments series
John Green - Looking for Alaska, An Abundance of Katherines, Paper Towns, The Fault in Our Stars, Turtles All The Way Down
Jenny Han - To All The Boys I’ve Loved Before trilogy, The Summer I Turned Pretty trilogy
S E Hinton - The Outsiders
Holly Jackson - Good Girls Guide to Murder series
Stephen King - Carrie, Christine, The Long Walk, The Talisman, Fairy Tale, Different Seasons, The Shining
E Lockhart - We Were Liars, The Disreputable History of Frankie Landau-Banks, Again Again
Emma Lord - Tweet Cute, You Have A Match, When You Get The Chance, Begin Again
Katherine McGee - American Royals series
Karen McManus - One of us is Lying trilogy
Marissa Meyer - The Lunar Chronicles series, Heartless
Erin Morgenstern - The Night Circus, The Starless Sea
Patrick Ness - Chaos Walking series, A Monster Calls, More than This
Meg Rosoff - How I Live Now, Just in Case, What I Was
Rainbow Rowell - Eleanor and Park, Fangirl, Carry On, Wayward Son
Adam Silvera - More Happy Than Not, History is All You Left Me, They Both Die at the End, The First to Die at the End
Jordyn Taylor - Don’t Breathe a Word, The Paper Girls of Paris
Scott Westerfeld - The Uglies series