Are you keeping track of your daily calories and macros? If so, this may be a good time for a visit to your nutritionist. It's very hard at your stage (2.4 years out) to make comparisons to anyone else except yourself. By this time your body has settled into pattern that perhaps needs a little tweaking. Your requirements may be very different from someone who is losing at a different rate because their surgery is more recent, their activity level is different, their basic metabolism is different, their degree of malabsorption is different, etc. Things change over time and a good analysis by a trained professional may be the best help you can get for getting through the home stretch and to the finish line.