Welcome to the forum
@Allan671
Well done for the positive changes you have already been making, and your terrific weight loss so far.
We have a few members who find MyFitnessPal really helpful in terms of keeping on top of their food intake and the distribution of nutrients.
It seems likely with an HbA1c of 49 that some relatively modest tweaks to your menu, along with cutting right back the obvious things like sweets, chocolate, biscuits, cake etc, will probably be enough to help your metabolism cope.
Low calories approaches can be extremely effective, but it may also be helpful to keep an eye on your total carbohydrate intake (not just ‘of which sugars‘), as it is carbohydrates that potentially have the biggest effect on raising blood glucose levels. Good to know you are aware of GI, and are aiming for sources of carbohydrate that are likely to release glucose more slowly, though these things can be frustratingly individual!
Hopefully your weight loss will help with your insulin sensitivity, which will also be a great help.
Have you considered getting a BG meter to check your individual responses to different meals and sources / portion sizes?
GPs are often a bit resistant to prescribe unless people are on glucose-lowering meds, but they can be a very immediate and direct way to examine how BG friendly your meals are for you as an individual.