Cindered Shadows save data is separate from the main game in Fire Emblem: Three Houses
Nintendo has confirmed that the save data for Cindered Shadows in the Fire Emblem: Three Houses Expansion Pass Wave 4 DLC is separate from the main game. However, progress in the side story will influence what you can do in the main game, including exploring Abyss. By continuing to progress in Cindered Shadows, players can…