What a great outcome! Well done with that. There's no reason to think more medication will be required right away. It took me several months to reach a higher amount, but my significant other manages fine with less. Responses vary from person to person.
I've been taking Reta for nearly eight weeks and have gone from 85 kg down to 77 kg. I began at 1 mg per week, moved to 2 mg in week two, and have stayed there. I recently got hold of another supply to use over the next couple of months. The pen version wiped out my appetite for the first couple of weeks, but lately I am still eating noticeably less while the weight keeps coming off. Is it likely I will have to raise the dose later to keep progressing, or might 2 mg stay sufficient?