Jane austen isn't Victorian. Anyhow suggestions:
John fowles: the French lieutenant's woman
Gabriel garcia marquez 100 years of solitude
Assume she's already read catcher in the rye by JD salinger but that's a teen fave.
Great gatsby
Jane eyre
Great expectations
Brideshead revisted
Frankenstein
The bell jar, my friends 14yo dd loves sylva plath.
birthday letters poetry by Ted Hughes as a counterpoint to the above. This may be a terrible suggestion as it didn't come out until I was older I think.
I used to love reading poetry at 14. Get her a decent anthology. Or in my case I mainly read poems by Philip larkin, TS Eliott and WH Auden at that age.
Kate Atkinson behind the scenes at the museum
Hilary mantels wolf Hall is a bit of a tome but she could dip her toe in with an earlier shorter book. I loved her but only found her at 16.
Once shes read jane eyre read wide sargasso sea by jean rhys
Assume she's read the diary of a young girl by Anne Frank but if not definitely that.
I think she'd be better choosing her own books at that age. Any required reading syllabus set by her own whims. I wouldn't have read what my mum suggested at that age but I had a desire to get through all the classics and make a start on modern classics.
It'll be frowned upon by some but you can get cheap / free audio books so you can listen to things as well as read. Try sitting with the classics podcast for free on Spotify. The books are on there too but you have to search. It's got a lot of African American literature that I ignored but Jane eyre and great expectations are on there. The frankinstein is a terrible reading But you can find a better reading on Spotify for free.
I could go on and on.