It's difficult to say definitively whether Apex Legends is dying or not. The game has certainly experienced a decline in player numbers since its initial release in 2019, but it still has a dedicated fan base and regular updates from the developers.
Factors that may contribute to the perception that Apex Legends is dying include competition from other battle royale games, such as Fortnite and PUBG, as well as the emergence of new games in the genre. In addition, some players may have grown tired of the game's mechanics or the lack of significant updates.