My experience with keto diet is that you have to get your daily calories from fats.  Fats don't produce insulin response, and therefore do not contribute to visceral fat storage.  Carbs, on the other hand, will spike insulin every time.  My observation and experience is that insulin triggers abdominal/visceral fat storage.  I've shrunk my waist to under 28 inches on a 6 ft. frame by optimizing caloric intake, whilst curtailing insulin response.

If my 25 year experience with all this is of value, I can say that for weight loss purposes, many meals per day, with about 4 hours in between meals, is best.  Any time I have eaten only one or two meals per day, I gain weight.  For the renewal purposes of fasting induced autophagy, intermittent true fasting would be best.  Time restricted feeding is a compromise for me, until I get around to doing a true fast.