What's the expected rate of weight loss with VGS for low BMI patient.

Hello,
Thank you for your question and congratulations on your surgery! 
In my experience, patients tend to lose 20-30 pounds in the first month and average 10 a month thereafter. That said, it is not unheard of for patients to lose little weight the first few months following gastric sleeve surgery. It is also common for patients to have periods of stalled weight loss. Factors that influence the rate and total weight loss include gender, age, starting BMI, and extent of lifestyle changes. Your results appear to be within the expected range of weight loss.
From what you share, you are doing an excellent job sticking to the recommended diet. I caution you to avoid puréed and soft foods and be careful you do not consume too many liquid calories. It is much easier for sleeve patients to consume too many calories through liquids than with solid food. This is because the liquids are digested more quickly than the solids, allowing the patient to more easily "overeat" if consuming high-calorie liquids. Excessive liquid calories can stall and even reverse weight loss. It’s also important not to consume liquids with solids since it can push the food more quickly through your stomach. 
Exercise is also very important: at this point the goal is 45 minutes of daily exercise. 
Follow up care with your surgeon and support team (ideally including a therapist and nutritionist) is essential. It’s also important not to feel discouraged during these times; it can take time to see the results of your lifestyle changes.
Kind regards,
Dr. Moein
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You are about two months out from your sleeve gastrectomy, with a starting weight of 207 pounds and a current weight of 186 pounds. That represents a loss of 21 pounds, which is actually a healthy and expected rate of progress at this stage. After sleeve surgery, weight loss is not always linear; it is very common to experience “stalls” or plateaus, especially around the 3–6 week mark and again periodically throughout the first year. These stalls usually resolve as your body adjusts to the changes in calorie intake and metabolism.
On average, patients can expect to lose about 60 to 70 percent of their excess weight within 12 to 18 months after a sleeve gastrectomy, though the pace and total amount vary depending on your starting BMI, adherence to nutrition and activity guidelines, and individual metabolism. Since you began at the lower end of eligibility, your overall weight loss will understandably be slower and may appear less dramatic than in patients starting with higher BMIs—but it is still very meaningful for long-term health.
From what you describe, your nutrition and protein intake sound excellent. Continue tracking, stay hydrated, and maintain regular follow-up with your bariatric team. Small stalls along the way are normal and not a sign of failure. The important thing is consistency over time, and if you stay on track, you can expect continued progress in the months ahead.