It depends. Honey could potentially be part of realistic fiction if its portrayal in the story is based on real-world characteristics and scenarios.
It's possible. If the story involving honey shows it in a way that's consistent with our understanding of honey in the real world and the context is realistic, it could be realistic fiction. However, if there are supernatural or fictional aspects attached to it, then it might not be.
Not necessarily. Whether honey is considered realistic fiction depends on how it's presented. If it's just a magical or fantastical element, then no. But if it's described realistically in a real-world setting, then yes.