What do they use at her school, iPads, Chrome books, Windows laptops / desktops and has she just started secondary school or is she moving up to another school next year and then might want something different?
Do you mean iPad?
Buy her a bluetooth keyboard, maybe one of those pens?
Does she have a TV in her room, there are ex corporate refurb mini PC's about the size of a book, think ex NHS etc as long as its 8th gen or newer.
Other options:
Give her your old PC and build yourself a 9800x3d super doopa thing with a NVIDIA 5090
Or turn her into a geek and get her something like a Raspberry Pi and teach her linux