My male veiled loves his romaine lettuce. I put it right on the plant soil (which I have topped with large stones since i have unsifted organic soil and i dont want him ingesting large pieces) if he's already ate his insects for the day. For some reason he won't go for it in the cup unless he gets baited to it with an feeder, then he'll generally eat the insect and then pick off the greens. Sometimes he even gets greens+cricket/mealworm. Lettuce wrap .
One of my males lunges at the leaves of his wax leaf privit...and eat them!!! I thought he was attacking something (he used to be an angry breeder and wanted to bite before breeding..thank goodness he grew out of that) but it was just leaves...he's the first one I've ever seen do that though.
i think that eventually it may take interest in the greens you gave it but it may take some time. the fact that she is eating the ficus tree leaves means that she is at least taking interest in greens so that is good.