Does your daughter like teething biscuits or similar foods? If so, what I did to get my son interested in solids was to dip the teething biscuit into the food and let him suck it off. I also would use my finger instead of a spoon. Try putting some pureed food on her tray and letting her play in it.
I’ve heard of a lot of babies that arent interested in solids until 10 months or even older. As long as she is taking her bottles and getting practice with solids, I wouldnt stress about it just yet. All of her nutritional needs are being met with formula/breast milk for the first year. I’m sure with repeated exposure, she will begin to enjoy it.