I have no desire to eat

I am autistic so I am aware that may have something to do with it. But I have no desire to eat majority of the time. This is a problem because I go to the gym which means it would be in my best interest to eat nourishing meals. Often times I have to force myself to eat because if I don't eat well then my performance in the gym plummets. Does anyone else struggle with this and how have you managed it?

I am in therapy as well btw and its still something I struggle with so looking forward to hearing from some community.