Hi Jack, and welcome! It really depends on what you mean by “bread for diabetics.” Low-carb high fiber bread is not easy to make and doesn’t really feel like “bread” to most people, but it can work. I have recently found (since I’ve started to eat a moderate amount of carbs) that homemade sourdough bread doesn’t affect my blood sugar as much as “normal” bread. Plus it’s amazingly fun to make.
So, for low-carb you can try looking up “keto bread recipes” on google, and you’ll find a lot of almond flour and coconut-flour recipes that while not tasting much like bread, will not raise blood sugar as much as wheat bread.
For sourdough for a bread-machine, you might try something like: Bread Machine Sourdough Bread Recipe | King Arthur Baking. King Arthur always has excellent recipes.
I’ve also found that whole rye (ruggebrot) or barley-based breads don’t affect my blood sugar as much either. I’m working on a sourdough rye (traditional Jewish rye) recipe, which I suspect will be pretty decent on the old diabetes 