I feed my cat 4x a day, dividing his two meals into 4 in an auto feeder. He gets less hunger pangs that way and enjoys his favorite activity twice as often, at least. LOL.
Seems to make no overall difference in BG readings, and lets them eat at night/mid-day so their body can stay more steadily fueled.
@Summer and Susie Exactly. I personally don't feed within 3 hours of shots/tests, to let it completely clear the system, and if they're a bigger cat like Dexter 12-13 lbs should be the goal which according to the calculator I used was around 230-260 calories IIRC depending on treats
https://petnutritionalliance.org/cat.php