I know there are varieties of jam (preserves) available in low/no sugar, I use the strawberry, that could be a spread on toast. There's probably sugar-free peanut butter available, too. In Europe I got used to eating ham slices and cheese on a roll for breakfast... even though it seems like lunch food but I got used to it and it provided lots of protein, which is good for breakfast. Do you eat fruit? That could be an option.
Have you found that a low sugar diet helps your symptoms? Was it hard to adjust to it, or didn't you eat much sugar in the first place? That might be something I'd try in the future... maybe. I might miss chocolate too much
Hopefully other people will have more ideas for you.