The following instructions describe how to flash a micro SD card with a Linux image suitable for running on the i.MX 8M NAVQ Plus kit from the Linux host as well as how to prepare the kit for booting from that card.
When the build is complete the resultant image will be located at the following path in the Yocto build directory tmp/deploy/images/imx8mpnavq/. Look for the following image: imx-image-desktop-ros-imx8mpnavq.wic.zst.
Insert a SD card (capacity of 8GB or more) into the Linux host PC. Write the decompressed image onto the SD card (change /dev/sdX to the actual device name, as available on your Linux host):