The release date was pushed to late August (August 24, 2021). According to the game’s producer, Denis Maltzev, the game is “complete and playable”, but they want more time to make sure it’s the best it can possibly be. In fully he states:

“We are currently at a stage where the game is complete and playable, but we need more time to finish playtesting, fixing, polishing, and postponing launch will give us the precious months to balancing phase, much needed for such important project for us, with its ambitious, open world, its complex narrative, deep turn-based tactical and RPG mechanics.”

source: pcgamesn.com