Analyst Simon Carless estimates Concord has sold just 25,000 units. This breaks down to 15,000 units sold on the PS5 and 10,000 units sold PC via Steam.
Circana analyst Mat Piscatella stated Circana's Player Engagement Tracker on Monday August 26 showed "Concord ranked 147th in US PS5 daily active players across all titles, with fewer than 0.2% of Monday's active PS5 players playing the game."
https://www.vgchartz.com/article/462274/analyst-estimates-concord-has-only-sold-25000-units/
For a major first party game, and particularly for a title that was in development for 8 years, this is disastrously poor.