You can find open-source KiCad templates for CM4 carrier boards on GitHub to jumpstart your design. 2. Orange Pi CM4 Schematics
Detailed schematics for the baseboard are available through official Orange Pi resources . cm4 94v0 schematics free
For those building their own baseboards, the official IO Board schematic is the industry standard reference. Download CM4 IO Board PDF You can find open-source KiCad templates for CM4