Perhaps you can switch (gradually if need be) to eggs, bacon, ham, lunch meat, etc. for breakfast. Make "protein boxes" like Starbucks, for example: hard boiled eggs, any cheese, blueberries, plain yogurt with berries. The boxes can be made in advance and the kids can help make them. If you give your children chocolate, I humbly suggest a sugar free chocolate I personally get for myself. I am keto so I purchase from choczero.com I cannot say enough good things about this company. I do not like white chocolate. I tried a white chocolate covered peanut butter cup from this company and fell in love with their white chocolate. My kids love the chocolate from here too (double dipped chocolate coconut covered almonds). I wish I knew everything I know now decades ago. I would have raised them keto/carnivore.
Perhaps you can switch (gradually if need be) to eggs, bacon, ham, lunch meat, etc. for breakfast. Make "protein boxes" like Starbucks, for example: hard boiled eggs, any cheese, blueberries, plain yogurt with berries. The boxes can be made in advance and the kids can help make them.