Look like you found the article I recommended.

To answer your questions: You will get into ketosis almost instantly with these supplements. However, this ketosis will only last as long as it takes your body to burn the ketones from the supplement.

Your body’s ketone production won’t be stimulated at all, it will actually be slightly inhibited until you burn the ketones from the supplement. The only way to sustain ketosis consistently is by fasting or following a keto diet (or if you have a lot of extra cash, taking exogenous ketones and/or MCTs throughout the day).

Does my explanation clear up the confusion? If you have any other questions, please let me know.

Keto OS might be able to help diabetics a bit, however, there is no research on this.

It is much better to follow the standard Keto diet if you have type 2 diabetes. It is scientifically proven to be both safe and effective for type 2 diabetes.

If you’d like to read more about how keto helps type 2 diabetics, check out this article:
https://www.ruled.me/the-ketogenic-diet-and-diabetes/