A third theme could be the intersection of faith and place. The little mosque on the prairie is in a unique setting. During the holiday, the story could explore how the people's faith is expressed in this particular location. How the vastness of the prairie or the local environment influences their celebration of the holiday, and how their religious beliefs shape their view of the place they are in.
I'm not very familiar with this specific 'little mosque on the prairie a holiday story'. It might be about the experiences in a mosque on the prairie during a holiday. Maybe it involves the unique cultural celebrations, the community gathering there, and how they observe the holiday in a prairie - like setting.
Well, 'Little House on the Prairie' isn't strictly true. It takes inspiration from historical times but incorporates fictional characters and events to create an engaging narrative.
Yes, it is based on the author's real-life experiences growing up in the Midwest during the 19th century, but some elements might be fictionalized for literary purposes.
A fanfiction on this topic could focus on a new family moving to the prairie where 'Little House on the Prairie' was set. They discover remnants of the old way of life and start to learn about the history of the place. As they do, they are inspired to bring back some of the traditional values and practices that were once common there, like community barn - raisings or shared harvests.