I think having any expectation around weight loss is difficult. It’s really going to depend on:
- how long ago your surgery was (it’s faster right after, it definitely slows down after 6 months
- age/height/gender (never ever compare yourself to a 20 something male!!)
- current weight (if your BMI is very high, you can reasonably expect a higher loss)
- activity levels and exercise
- your diet (how closely are you following it? What are your calories/macros? Some plans target faster weight loss, eg keto, some aim for you to lose slow and steady.
- other factors, eg your hormones, gut microbiome).
Even then, there will be fluctuations. Some months you will lose more and some less. This is a long road for some of us. And you will stall, and then suddenly you will drop a few rounds really quickly. And it will be annoying.
My advice is to be patient and honest with yourself. If it is weight loss is slow, assess how you can improve without beating yourself up!