I personally love the D7500. It does have a flippy screen, but not same kind as D5xx. I personally like the D7500/D750 type screen better. It has all the knobs, dials, buttons and is logical next step up in learning curve from D5xxx in my opinion. Plus she can use all her existing lenses easily enough.
I've progressed since 2009 from D40 to D5100 to D7100 to D7500. The D7500 is a great camera. (I also have a D750, which pairs nicely in regards to usage/ergonomics, etc.).
There are other features she might like, the group area AF in particular is nice for moving subjects, and the AF in general is big upgrade from D5xxx.