Despite the immense popularity of The Lord of the Rings franchise, adaptations of J. R. R. Tolkien's work have focused on only a small selection of his stories. Pieces of Middle-earth media, ranging from cartoons to live-action films to video games, have either been adaptations of The Hobbit and The Lord of the Rings or new stories not directly adapted from Tolkien's writing. Even Amazon's The Lord of the Rings: Rings of Power, which took loose inspiration from The Silmarillion, excluded most of the novel's main events in favor of original ideas.
Source：https://www.cbr.com/lord-of-rings-adapt-middle-earth-stories/
