Breakfasts are often something people find difficult to change as the usual go to cereals and toast are not too good if you are trying to reduce your carbohydrates. Things which are good are eggs in any form with bacon, mushrooms, tomatoes, smoked salmon are all good choices. Full fat Greek yoghurt with berries, and seeds and maybe a small amount of a low sugar cereal like All Bran or Granola for a bit of texture.
Some people find porridge is OK for them but others find it too high in carbs. Some people have low carb bread which they can tolerate but 1 slice only.
As you are only prediabetic then reduced portions of your usual breakfast may be OK but just be mindful of high sugar containing cereals and fruit juices which are best avoided.
Have a look at the thread What did you eat Yesterday for some good meal ideas from people with Type 2 or prediabetes.
Also have a look at the learning zone for information. Beware of some of the unfounded information you might find in Google searches.
Welcome to the forum by the way.