This is something that interests me.
IMHO...people in early sobriety should make that their number one priority. Eat what you want. Consume sugar if you want. How long does early sobriety last? I don't know. When someone gets comfortable they can reign in their diet.
Sugar is so bad for us. It's in so many things. Low fat and healthy (used loosely) things have sugar too. Consuming sugar is relatively new to humans (few thousand years). We have not adapted to it. Causes a lot of health problems (obviously) but probably a lot of mental health problems too. Sleeping issues as well...and crashes.
I have recently come to admit I have a hard time with moderation. I went months cutting back on sugar except that in fruit and the occasional condiment like ketchup. I need to get back to it.
People will feel better if they cut out sugar.
Good topic.