isn't that what GLP1s are for (before you get full blown type 2)

Yes, but even lifestyle changes (like a diet low in glycemic load and building muscle) can help reduce many of the harmful effects of type 2 diabetes, even sending it into remission for some people in early stages.

Type 1 is a different story. It’s the lack of natural insulin production (due to a damaged pancreas, autoimmune or other causes), basically the opposite problem to type 2, and no amount of lifestyle changes will replace of need of insulin doses.

I just want to make clear what the other commenter said: type 2 is completely reversible in its early stages. Lose weight, eat a more healthy diet, and you should see your body return to normal.

Unfortunately, there's a serious time limit on this news, as the disease does permanently damage your cells, but in a way that's not terrible. It's probably easier to be shocked by a diagnosis into a lifestyle change than to find out now and undo 30 years of living with daily insulin injections anyways.