Congrats on your loss! It takes a lot of determination to get where you are, and I’m proud of the work you’ve done so far. Some preface:
GS is like surgically forced IF, but it isn’t a cure-all. At least 30% (last i checked) regain the weight. One cannot expect to have the sleeve do all the work. Eat like shit and one’s stomach will bend to elasticity and them they’ll regain the weight.
That said…
A stall is more or less 3 months at a static weight without loss. Have you hit this point? If not, i suggest patience. You took a life time to gain the weight. It won’t take a life time to lose, but likely upwards of a year or longer. 40 excess pounds (of fat) can last the average person almost 3 months without food. Build some time (in your mind) to account for maintenance and repair of your body, not just loss.
My $0.02.