If she didn’t like Jethro Tull she might not like Camel but they were another prog band that prominently featured flute. Here are a couple good examples.
Here is a live version of it with Ian McDonald playing the flute. I think I’ve watched it at least 20 times over the past few years; I find it incredibly beautiful.
Moe Koffman played jazzed-up (literally) arrangements of Bach that are very good for what they are - not the top Bach playing in the world and not the top jazz flute playing in the world, but really good as themselves.
A lot of what I want to suggest has been suggested already in this thread. I’d add that the song “California Dreamin’” by The Mamas and the Papas has a flute solo (alto flute! A flute that’s a bit bigger and lower-pitched than the flutes most people play.) “You’ve Got To Hide Your Love Away” by the Beatles also has one or two flutes in it - maybe also the alto flute, but I’ve never quite been able to find out.
Chaminade’s Flute Concertino is a piece I’ve always liked.