Technically yes, they could be fed to rabbits, but I wouldn't ever chose to. The first one is just grains and sugar, and the other one has so many ingredients it just boggles the mind. Neither is all that great of a choice. It's easier and cheaper to stick with simpler all natural treats, and your bun is likely to enjoy them just as much, or more.
If your bun isn't sensitive to carbs and fruit causing digestive issues or mushy cecotropes, some good treat choices are fresh fruit, carrots, dried fruit (eg banana chips, craisins), rolled oats, sunflower seeds. Though keep in mind that these are treats and should be fed in limited amounts, which amount is based on your rabbits weight and tolerance of the food.
It's also best to gradually introduce into the diet slowly, starting with a small amount, and only increasing to the normal feeding amount if there are no signs of digestive upset or mushy poop. It's important too, that your rabbit is a good hay eater, as the fiber helps ensure good gut function and reduce the chances of sugars causing an imbalance.
https://rabbitsindoors.weebly.com/treats.html
Medirabbit: feeding rabbits
https://wabbitwiki.com/wiki/Treats
Veggies and forage are also ways for your rabbit to enjoy healthy treats. My buns always loved when I fed them dried willow leaves, and it was free.
https://www.harcourt-brown.co.uk/articles/free-food-for-rabbits