Here is Capcom’s full message on the delay:
The previously announced July 2021 launch of Resident Evil Re:Verse is being moved to 2022 so that the team can continue working to deliver a smooth gameplay experience. We will share updated launch details at a later time. Thank you for your patience and understanding.
For players who purchased a physical version of Resident Evil Village, we recommend that you keep track of the included Resident Evil Re:Verse download code or add it to your account now so that you are ready to play when the game launches next year.