No, Ma June does not appear in the Fallout video games.
Ma June's Appearances
Ma June is a character specifically created for the Fallout television series. She makes her sole appearance in the TV series episode titled "The Target". While the Fallout TV series is set within the same universe as the popular video game franchise, it introduces new characters and storylines that are unique to the show.
Therefore, if you are looking for Ma June, you will find her exclusively within the narrative of the Fallout TV series, not in any of the established Fallout video game titles such as Fallout 3, Fallout: New Vegas, Fallout 4, or Fallout 76.
The Fallout Universe Across Media
The Fallout universe is vast and continues to expand across various media. While many beloved characters, locations, and lore elements originate from the video games, the television series serves to broaden this universe by introducing original characters like Ma June. This allows for new narrative possibilities and ensures that the series offers fresh perspectives while remaining true to the established lore of the post-apocalyptic world.