If using a CM4 with eMMC, the carrier board's SD card slot is usually disabled.
For anyone attempting to repair a CM4 or design a custom carrier board, the boardview is an indispensable tool. While the official schematics for the CM4's internal layers remain proprietary, the availability of community-traced boardview files has made it possible to diagnose and fix hardware issues that would otherwise be impossible to solve. cm4+94v0+boardview
Given this context, I assume you are looking for a review of a file or a hardware design related to the Raspberry Pi CM4 module, possibly with a focus on safety and regulatory compliance. If using a CM4 with eMMC, the carrier