Hi.
There are only 2 low carb kibble that the group recommends. They are Young Again and Dr. Elsey's. 10% carbs or less is considered low carb. Dr. Elsey's are all under 8%, with chicken being 2.48% and salmon being 1.82%. The other flavors are often out of stock. You can order through Chewy.
I'm not sure about the exact carb % for Young Again, I just know it is below 10%. You order this directly from them.
Neither food is inexpensive. Almost all other kibble, even prescription food from the vet that is supposed to be diabetic food, is over 20% carbs. Some kibble is even 30-40%. Because cats are obligatory hunters, carbs aren't essential for them. Their nutritional needs are met by eating a diet that consists of animal-based proteins. This is why it is important to feed all cats low carb, but it is imperative for diabetic cats.
We have a food chart, but it only list canned foods.
Hope this helps. Happy Holidays.