The Raspberry Pi Foundation has just updated their Raspberry Pi Imager! What makes this update
The brand new Raspberry Pi Compute Module 4 and Compute Module 4 IO Board (Companion
POWER-UP PCBA #4: Free Customization Raspberry Pi Compute Module 4 Carrier Boards with Seeed Fusion PCB Assembly Service.
11th October 2021 Update: Great news! Raspberry Compute Module 4 is now back in stock!