The PCIe connection should work after a reboot, but your Pi won't try booting off an NVMe SSD yet. For that, you need to change the '''BOOT_ORDER''' in the Raspberry Pi's bootloader configuration:
* Use tool '''raspi-config''' to set boot order sudo raspi-configThen select '''6 Advanced Opitions''' => '''A4 Boot Order''' => '''B2 NVMe/USB Boot''' answer '''Yes''', then <code>sudo reboot</code>* Run the following command to edit the EEPROM on the Raspberry Pi 5set boot order.
sudo rpi-eeprom-config --edit
Then change the BOOT_ORDER line to the following: