Hi donnab! Her sugars and HbA1c are still quite high, but heading in the right direction. Now that she's on a full Metformin dose you'd expect them to come down further - typically the "starter" dose is mainly to see how well you tolerate it, and you have to wait for the full dose to see much impact.
Beyond that, usually mainly up to dietary changes, maybe some weight loss, and a bit more exercise.
Food: The best advice IMO is to self-test blood sugar before and after eating to see what foods have what effect on her. Everybody's different, so take any specific food advice with a pinch of salt, but it's generally a matter of working out what kind of carbs in what kind of proportions have the most impact.
You'll see plenty of people around here have managed to get their BG levels down from where your daughter is now to "normal" levels, so there's every chance she'll be able to do it too, with a bit of focus.
I found this pic very helpful to get my head around HbA1c and BG:
View attachment 10158
It relates HbA1c (top numbers) to average daily BG (bottom numbers). She'll want to get her HbA1c down into the greener end of the spectrum, so below 48 for most people, which means targeting avg daily BG less than around 8. But it doesn't have to happen all at once and actually it's probably better in some ways to do it over maybe 12 months, rather than all at once.
This is a very helpful, knowledgeable place so do feel free to ask a lot of questions!