I have type 2 diabetes, and one of the first things I did was to buy a monitor - one of the continuous glucose monitors. Both Dexcom and Freestyle Libre will send you a free one to try, if you go on their website. If a type 2 diabetic is on insulin, they qualify for free monitors, otherwise you need to pay for them, which is what I do.
@elliejjtiny - I have made big changes to my diet - no more fruit juices or sugary sodas, almost no bread, and I restrict carbs with my main meal. As far as possible, I use whole grain carbs - brown rice, wholewheat pasta etc. I have low carb/no carb lunches - cold chicken, pickled beetroot and coleslaw, cheese and celery, hummus and crudités.
It isn’t easy, and I have every sympathy for your dh - it was a shock when I was diagnosed - even though I knew I was very overweight and it was a real risk - I genuinely,y felt as if my life was ruined, and I’d never enjoy food again, but I’ve adjusted, and do still enjoy food. I even eat sweet things sometimes - having the continuous glucose monitor means I know that my sugars are in the healthy range most of the time, so I reckon the odd dessert/ice cream won’t be a disaster.
Does your dh know the risks if he doesn’t get his sugars under control? Losing his eyesight, damage to his circulation and nerves, especially to his feet - I have to have an annual eye test and check of my feet to ensure they are still healthy, and I have been warned to be careful not to hurt my feet as it could be really slow to heal or might not heal at all, leading to really serious problems.