Kittens will not die from overeating. Kittens may feel unwell when they overeat, but this usually does not have fatal consequences.
However, overfeeding can cause other problems such as indigestion, vomiting, or diarrhea. These problems can lead to dehydration and malnutrition, which in turn can affect the kitten's health.

To prevent kittens from overeating, ensure they are given the appropriate amount of food and follow the feeding guidelines on your veterinarian or the cat food packaging. Regular feeding and adhering to proper dietary habits are crucial to ensure kittens receive adequate nutrition while preventing overeating.
If you are very concerned about your kitten's eating habits or other health issues, please consult a veterinarian for professional advice and guidance. They will provide you with the most suitable advice based on your specific situation.