The Writers Guild of America has published the list of credited writers for the first five episodes of Obi-Wan Kenobi. As was known, Joby Harold (Army of the Dead, King Arthur: Legend of the Sword) wrote all the episodes. But he had many co-writers.
Episode 1: Teleplay by Joby Harold and Hossein Amini (Drive, The Alienist) and Stuart Beattie (Tomorrow, When the War Began; I, Frankenstein). Story by Stuart Beattie and Hossein Amini.
Episode 2: Teleplay by Joby Harold. Story by Stuart Beattie and Hossein Amini.
Episode 3: Written by Joby Harold & Hannah Friedman (Roadies) and Hossein Amini and Stuart Beattie.
Episode 4: Written by Joby Harold & Hannah Friedman.
Episode 5: Written by Joby Harold & Andrew Stanton (Toy Story, Toy Story 2, Toy Story 4, WALL-E…)
Amini was supposed to be the main writer for the series, but he was replaced by Harold during development. The fact that he’s credited for the first two episodes probably means that many of his ideas were kept.