How often do u feed your fat tail?

I have a 11 month old fat tail that I feed every day alternating between dubia and mealworm. Currently his weight is 66gram.

Recently hes been refusing dubia more and more while keeping the same appetite for mealworm which I suspect is due to it wanting to snack more on mealworm.

But it got me thinking if I should change his diet frequency now that hes almost a year old. Any advices are appreciated