Lockdown's definitely been a challenge. I got diagnosed three months ago and my diet whilst I was working from home prior to diagnosis was atrocious, lots of comfort eating of crisps, biscuits, chocolate etc, so I do empathise.
When you're tempted by the chocolate, can you limit the amount that you have, ie just have a square, then put the rest back in the fridge? Or could you replace the chocolate with a small portion of raspberries/blueberries? I know it's not the same, but you still get the hit of sweetness, but the berries are a lot kinder on your blood sugar levels. I have low fat babybel cheeses in the fridge if I really need to eat a snack - they're 42 calories, and I cut it up into little bits and eat it as slow as possible to distract myself from crisps etc.
Maybe start
low carb baking with your kids (sorry, no idea if they're the right age for wanting to help you bake!) - you could all make cup cakes, which you get the joy of preparing and then eating all 3