These are my observations. If I were starting from scratch, with the HbA1c level I had, I would go to Germany or Russia and
under clinical supervision do an extended fast, and I must stress this in bold undertake the programmes that they do,
and not attempt this at home privately (see YouTube below). This ultra aggressive form of diabetes treatment would have dropped the visceral / liver / pancreatic fat like a stone, so for my version of Type 2, would have got me to physical results extremely quickly.
This would have been painful, but I was in extreme pain anyway, and either the German or Russian centres have demonstrated expertise, with track records. I believe technical remission would have been within a month. Mental conditioning would have been required as a larger person would have gone in a thinner would have come out.
The trick would have then been how to eat "normally" to the condition status afterwards, which in my view is as
@nutribolt says - acknowledging that high carb days are over, but the right carbs are in. I would have wanted some basic meals I could use for a month that were sympathetic to maintenance and follow up support.
A more conservative fasting I think is optimal such as 16 / 8 or 18 / 6. Once someone is fat adapted, as it becomes natural to not want to eat often anyway. I have been testing for some time OMAD and TMAD. I believe that OMAD is great for general purposes. I am doing more TMAD with a window of around 6 hours to get enough protein in to support my workouts; but sometimes I slip into OMAD just because of how the day is going.
I don't think multi-day fasting is a long term strategy, I would drive autophagy via the exercise route.