I am T1. I do not follow Bernstein, nor do I count carbs. I do restrict carbs by food type, which is good enough to for me. I basal inject but usually (!!!) do not need to bolus.
I do not eat pasta, rice or starch veggie of any type. Ever.
I limit fruit, grain and legumes to maybe 1-2 single servings per week. Meaning 3/4 cup of berries. Or 1 slice of bread or 1 lower carb flat wrap. I had legumes, peanut butter, about 4-6 weeks ago in 4 ingredient cookies and not since. I had a 3/4 cup of raspberries maybe 2 weeks ago.
If I eat a restricted carb diet and don’t have to count the non-starch veggies that I eat in super abundant amounts every single day. I do eat meat, eggs, tree nuts, olives and olive oil and seeds a lot. Just a thought.