Have you tried reducing the number of toys hanging above the mat? I think mine liked just 1 thing from his and we'd change them around now and then. Mine also detested a bouncy chair, he was older than yours and I got it only because he was having trouble with reflux and I though being slightly elevated at times would help him, just like yours he'd smile for a minute and then scream murder to get out. I just stopped using it, tbh they are better off getting floor time anyway if there isn't a need for elevation.
Maybe try a plain blanket for her to lay on and watch the world or chat with you rather than the musical one. Although it may be too much for her right now she may love it in a few months.