Hi, I would speak to your Dr to rule out other reasons but metfomin curbs appitite and is weight loss. Statin in its self doesn't cause weight gain, but it is known to reasure people who, while on a high carb diet. Have more fat without cutting the carbs and so have more total calories, which can increase weight.
@daisy1 has some very good info and she will post it soon
as a newly diagnosed diabetic, you may find you need to change your diet. reducing carbs in particular
This gives a simple overview to how it can work for a T2
For me, the more carbs we eat the more carbs we want. They don’t give up easy and it’s biochemical