The Radxa CM3 can be used instead of a Raspberry Pi CM4 or with carrier boards that support it. Radxa's compact board has a few advantages over the CM4 too, with greater eMMC bandwidth being one of them.
https://www.notebookcheck.net/Radxa-CM3-An-SBC-that-is-compatible-with-the-Raspberry-Pi-Compute-Module-4-ecosystem.578117.0.html