In many fanfictions, Prim's location can vary depending on the plot the author creates. Sometimes she might be in a safe haven, while in others she could be in a dangerous situation.
Well, Prim in Hunger Games fanfiction could be anything the author decides. She could have new adventures, face different challenges, or have relationships that weren't shown in the original canon.
A post - Hunger Games plot could be that Katniss and Prim are trying to help the children of District 12 who have been orphaned or traumatized. They start a small school or a healing center. Katniss teaches the kids survival skills, and Prim uses her medical knowledge to help them heal both physically and emotionally. This could also involve some challenges from the Capitol - loyal remnants in the district who don't want things to change.
Well, it varies a lot. Sometimes Prim could have survived or had a more prominent role. Other times, new challenges and relationships could be introduced for her. It all depends on the specific fanfiction you're reading.
Hunger Games fanfiction about Prim usually explores her character in different scenarios or gives her additional storylines beyond the original books and movies.
Well, in Hunger Games fanfiction, Prim is sometimes depicted as even more resilient and influential, having a greater impact on the events of the fictional world.