There was a useful thread on low carb snacks here.
https://forum.diabetes.org.uk/boards/threads/carbohydrate-free-or-low-carbohydrate-snacks.57509/
There's also a thread somewhere about how many carbs people generally eat, only I can't find it. The general opinion seemed to be that some people ultra low carbed, others tried to keep them lower, and some found they got on better with a diet that included slower release carbs. I think the ultra low carbers tend to be type 2 s controlling by diet and exercise, and also some type 1s who find carbs mainline straight into the bloodstream, and low carbing works well for them. On the other hand, there are some Type 1s who find low carb/very slow release carb means their meals get into the bloodstream too slowly match their insulin, and they hypo after a meal, so including more carbs is what works for them. ( I'm one of those!) Though I think most people on here find that a load of white bread, pasta or white rice isn't a good idea, from the point of view of causing spikes in your blood sugar.
I think what I'm saying in a long winded way, is that most people experiment and find what's right for them, as everyone's body reacts differently.