Yes, there are some. You can start by looking on fanfiction websites like Archive of Our Own. Just search for 'elsa x olaf fanfic' and you'll find various stories written by fans.
Olaf might tell about their journey of self - discovery. For Elsa, her struggle with her powers and learning to control them while also accepting herself. And for Anna, her loyalty and love for her sister, how she overcame difficulties in their relationship.
In 'Olaf Tells Stories', Olaf is likely the main focus or protagonist who is engaged in the act of storytelling. It could be that Olaf has unique qualities or experiences that make his stories interesting. Maybe he is a wise old man, or a young adventurer with many tales to share.
Olaf could be a friend, a family member or just someone in a story. To know what story he tells, we might need to consider the setting. For example, if it's in a school environment, perhaps he's telling a story about a science experiment gone wrong. Or if it's in a more traditional storytelling setting, it could be a folk tale passed down in his family.
Sure is. ET features a story centered around an alien visitor, which is a staple of science fiction. The movie also incorporates elements of fantasy and adventure within a sci-fi framework.