If you are looking for this specific build number, it most likely refers to a third-party app or game rather than the Play Store itself:
However, the specific tag is widely associated with the game Asphalt Legends - Racing Game (specifically version 3.8.0k released in late 2022). Understanding Version 3.8.0k Download APK [Google Play] v3.8.0k
This version was a major update for the racing game, often downloaded as an APK bundle for devices running Android 7.0 or higher. If you are looking for this specific build