The hunger urges do come back any where from around 6 to 12 months +/-. As @SkinnyMingo1408 said the surgery is a tool & you can’t rely on the the temporary benefits like reduction of hunger & appetite which don’t last. The honeymoon period is an opportunity to establish new eating habits, introduce new more nutritious foods & cooking methods, reflect on what drives you to eat, etc.
Is what you feel real hunger or head hunger? Is there a reason you’re hungry (late for a meal, ate a small portion at a previous meal, missed a meal, been very active)? Are you wanting to eat a specific food, texture or flavour? (This is head hunger not real hunger.) If you are eating regularly, are eating nutrient dense food in recommended portion sizes you shouldn’t be feeling so much hunger you have trouble controlling the urge & are driven to eat. Do you still measure & track everything you eat? Have a chat with your dietician to review your food choices, portion sizes & calorie intake to ensure you on track.
Maybe finding a therapist will help too. Many find therapy very beneficial in understanding their eating habits, what drives them to eat & the reason behind them.
The head work really is the hardest part of weight loss.