When it comes to diabetes low GI is the key, it’s not about completely cutting any food groups just about being more careful with foods that raise your sugar levels.
protein, fat and fibre should take a more prominent role, with carbs reduced and the ones you do eat being more complex. You also should try where possible to combine carbs with a protein or fat as that helps to process and break them down.
So brown bread with whole seeds in it not white bread, whole grain pasta, brown rice etc.
If you want toast have it with nut butter or scrambled egg, apple slices with cottage cheese.
Go with whole foods like full fat milk and yoghurts rather than low fat versions, fat is good for you in moderation and it helps to break down sugars. Nuts, seeds, beans, lentils, non-starchy veg (stuff grown above ground), berries, lean meats, eggs.
You mention a physical mobility issue but if you are able to then a 20 minute walk after a meal makes a huge difference in my blood sugar readings, it is amazing how effective a small amount of exercise can be so anything you can do will be good.
The other thing that is really good at controlling my sugar levels is having a decent break in eating every day, it gives time for any sugar in your system to be processed without adding more, so if you can stop eating by 8pm and then have a solid 12 hour break that will help too. If you really do find you need a late evening snack then make it something that is zero carb, a boiled egg, a bit of almond butter, a couple of spoons of cottage cheese (Longley farms full fat is wondrous stuff) something like that.
i was diagnosed with T2 last August, HbA1C was 96n/mol so i was put straight on insulin and metformin. I wore a Freestyle Libre CGM to monitor by sugar levels and in the early days they were in the high zone over 80% time, coming in at up to 28 n/mol 2 hrs after eating. It’s now under control, I’m on Mounjaro and I control my diet using the rules above, I’m now in normal range 99% time, dropped the insulin and metformin and HbA1C was 37 n/mol at last check which is in normal range.
There are foods I just can’t eat except as a special occasion, potatoes unfortunately are on that list along with the obvious cakes and sweets, some of the more surprising highs can from things like muller light yoghurts and porridge.