Your swelling is to be expected post-op. Everyone heals at their own pace and so keep your appointments with your surgeon and make sure you follow all recommendations. Good luck with your recovery.
It seems to me that you have the expected swelling 9 weeks after surgery. Everyone heals at different speeds so comparing your healing to another person does not really matter. As to how best to resolve the swelling, maybe consider a lymphatic massage. They seem to help quite a bit.
Thank you for your pictures. In my opinion, your tummy tuck looks very reasonable. It is difficult to determine from your picture if you have swelling still present or not. Only a clinical exam would be helpful in that regard. Unfortunately, you can not judge your healing versus another person's healing. Best wishes
Every patient will respond differently to surgery and this includes the swelling. Swelling can take several months to resolve and some patients may still have residual swelling a year out. Watching your salt intake and wearing a compression garment or spanx may help.