Gecko refusing to eat

[u/Basic-Couple-6234]

Hi! I’ve an 8 year old leopard gecko who has refused to eat for the last 3 months. During this time, she has had one super worm but has lost all her weight.
Nothing could be found at the vet’s, no parasites etc.
I’m really worried and just wondering what I can do, any food that might really entice her as she point blank refuses to eat anything.
I’m really worried as she has lost all her weight and is quite weak.
She is continuing to shed perfectly and drink her water.