If she’s been riding on a hybrid and she wants a nicer one, a nicer hybrid will check all her boxes.
For road bikes, at her height, she’ll be looking at the very small side of size ranges (49 at Trek, 2-3XS at Canyon, 44 at Cannondale, etc.). Road bike geometry gets a little funky at that size, and bike shops don’t stock it as often. If I were the logistics officer supporting her research, I’d find all the local shops who have bikes in those sizes and see if she wants to go on a “is this bike comfortable” field trip. Also keep in mind that the manufacturers who make “women’s-specific” frames (e.g. Liv or Canyon, who change the frames in addition to the touchpoints) optimize for the short torso/long legs archetype, so those bikes might fit her better.