Any chance you could get her to eat raw food? I've just recently transitioned my Luci to raw - she's fascinated with the FoodFurLife that I purchase to mix with it...she loves it!
https://www.foodfurlife.com/#/
Also, I've had good luck with sprinkling Forte Flora over her food when she's feeling picky...and lately I've switched to this flavor topper:
https://www.chewy.com/dr-tims-flavor-booster-genuine-freeze/dp/105062
and Sometimes we sprinkle freeze dried salmon or chicken over her wet food...that helped too.
I sprinkle over a variety of low to zero carb canned foods like Friskie's pate, Fancy Feast and a store brand of 0 carb pate. I was so upset about Luci's diagnosis that I actually threw out all her kibble - I didn't realize that she might have been addicted to it...she seemed to realize that there wasn't going to be any more kibble because all she ever found in her dish from that day forward was wet food...it was sink or swim...she ate the wet food ... hate to say it, but there weren't any other options (at least not in the house)...I never bought kibble again until a vet sold me a bag of DM - I was a fool and believed him - and then I read the ingredients with a magnifying glass when I got home and saw all the crap in there - corn and fillers...OMG! What a waste of money...so they got me that time too...I donated that food...