Genshin Impact recently introduced update 6.5 ("Moon VI. Song of the Hollow Moon: Rondo - The Foretold Encounter").
miHoYo (HoYoverse) also announced the end of support for the PlayStation 4 version of Genshin — it has stopped receiving updates.
miHoYo will continue to support Genshin Impact on modern Sony consoles and encourages players to upgrade:
We recommend that PlayStation4 users continue playing Genshin Impact on PlayStation5 or other devices. This will not affect your game progress.