How to use pci express serial card in raspberry pi compute module 4?

Connecting devices with PCIe to RPi5 : rraspberry_pi raspberry pi pcie slot When running BalenaOS, the system only boots when there is no NVMe drive in the PCIe slot If we install the NVMe drive the system does not even raspberry pi 4 pcie slot coral edge tpu on raspberry pi 5 pcie slot i am not bullish on raspberry pi's onboard gpu, the opencl support is not coming through coral

raspberry pi slot machine The P02 PCIe Slot for RPI5 is a Raspberry Pi baseboard designed to convert the Raspberry Pi's PCIe into a PCIe x1 slot