Hi Colin,
I think when we start keto we go through quite a few adjustments over the first few months. And then probably end up tweaking things long after that. I used to eat breakfast, like you are doing. That fell by the wayside, and I never looked back. Snacks took a while to disappear too, but they went eventually. Nowadays, if I get peckish withing 6-8 hours of my last meal, I know that I am either bored, or didn't eat enough in that last meal.
Don't try and force these changes, they will just happen over time. Although since you and I have different bodies and different lifestyles, then the changes that happen to you will be different from mine. But they will definitely happen. Things just evolve.
Looking back I just can't believe how much I used to eat. 3 meals and at least one snack? How did I do it? Yet looking back at my food diary (well, back to the early days of this thread
https://www.diabetes.co.uk/forum/threads/what-have-you-eaten-today.75781/ ) I realise just how much things HAVE changed.
Now I am on 2 meals a day, or one meal and a snack. I try and base my eating around fat, not protein. That probably sounds v odd to you, but it just kind of happened. And it works very well indeed. So a snack for me is 4 slices of chorizo (20+ slices for £1.70 at Tescos), microwaved til crispy, with a good heaped teasp of cream cheese (49p/250g for Tescos own brand) spread on each one. My meals are protein to hit my protein requirements, then fat til I feel full, then veg on top if necessary. My husband finds veg necessary. I am currently veg dodging following an upset tummy. lol.
So basically I am saying, don't sweat it at the moment. Make sure you are eating enough protein and fat that you don't get hungry before your next meal (butter, grated cheese, mayo, fat on meat, olive oil on salads) and over time your appetite will naturally change.
The mental adjustment going from low carb (protein, with moderate fat and lots of veg) to keto (protein, with lots of fat and some veg) is quite a leap, so give your mind and your body a few months to adjust.
Hope that helps.