You said in a previous post that the NHS "remission T2 diet option is not on offer where I live", but that post seems to have been before you spoke to your GP? If you've only gone by information online, do ask your GP specifically about it; the NHS is supposed to be in the process of rolling out this programme, so it may be available in more areas than are listed online. The great thing about the NHS programme is that you get regular support from a dietician/counsellor, for a whole year, in sticking to the initial very low calorie phase and then also finding and sticking to a healthy maintenance diet.
Travellor's previous comments are correct. There are three different ways of dealing with Type 2:
1) Just take drugs to try to manage it.
2) Change to a low-carb diet, permanently, to try to manage it.
3) Go on a very low calorie diet ('VLCD')-- the 'Newcastle Diet'-- to try to reverse it.
If you go for option 3, and it works-- this means you have reversed your insulin resistance, so you can eat a normal healthy diet for the rest of your life; you do not have to eat low-carb.
Where option 3 works, it works because a crash diet-- a VLCD for 8-12 weeks-- makes your body particularly likely to shed visceral fat. (It is excess visceral fat that triggers T2D. Some people have excess visceral fat even if they don't have much subcutaneous fat, and some people can have lots of subcutaneous fat but little visceral fat.) Gradual weight loss can lead to losing visceral fat, but is less likely to-- you may only or mostly lose subcutaneous fat instead-- so is less likely to achieve the goal of remission/reversal.
There's a lot of good information online about the Newcastle research and the Newcastle diet, for example this booklet, produced by the Newcastle team in 2018:
https://www.ncl.ac.uk/media/wwwncla.../files/201809 Sample Recipes & meal plans.pdf .
If the NHS programme really isn't available in your area, you should give your GP some more information about the Newcastle plan, and the NHS programme-- unfortunately, a lot of GPs don't really know much about it-- and discuss how, specifically, he or she could support you.
Finally: You say "the remission results for such a diet are less than 50% success which scares me rigid." That's not quite correct. In the main study to date, nearly two-thirds of people achieved remission-- *if* they lost 10kg or more and kept at least 10kg off for two years: see for example
https://www.diabetes.org.uk/about_us/news/weight-loss-type-2-diabetes-remission-direct-latest .
So, if you kick-start with the Newcastle diet, then lose the rest of the 13kg you're aiming for, and then keep at least 10kg of that off-- you are very likely to achieve and maintain remission. And, even if you don't achieve reversal, studies show that doing the VLCD is likely to improve your blood glucose and reduce your need for medication. Well worth a try!
