The thing about cauliflower (and broccoli) is that they are both low in carbohydrates. I've just had a large portion of cheesy cauliflower and broccoli to go along with my steak fried in garlic butter. Total carbs - maybe 6g.
The thing is, that being low in carb, cauliflower won't add much to anyone's blood glucose: it won't
lower blood glucose because that's not how these things work. Eating cauliflower and not removing carbs from the rest of my diet would have little or no impact. Cauliflower is part (but only part) of my overall approach.
https://josekalsbeek.blogspot.com/2019/11/the-nutritional-thingy.html
Edited to add the link mentioned in another post