Not sleeve but RNY here and I can say you can stretch it out a bit. I can definitely eat grazing style all day and definitely gain weight back (as I found out over Christmas tho year). It’s a Conscious choice to eat healthy regular planned meals to keep the weight off. When I want to slide back to binging to handle life and feelings, I use my skills from eating disorders therapy. The feelings of wanting to binge are still there, but I’ve worked really hard to substitute healthier rituals to deal with anxiety and depression and just feeling unlucky. I strongly suggest OA or an eating disorders therapist. The size of your stomach doesn’t really matter. If you want to eat the whole bag of cookies or chips you can do it. Or, you could choose not to and have sex, crochet, go for a walk, talk to a friend, journal, bird/star watch instead. It’s all a choice. The fact that you are investigating choosing surgery is a choice for yourself to live a healthier life.
Why surgery at all then? It’s true it’s a metabolic “tool” that helps your body with the healthier choices you make. It’s like an e-bike, you still have to steer and pedal.