Broken Boot
I found this on the wiki. The way I read it, I need a uboot on the emmc (possibly spi flah as well), it is what defines the boot order. Even if booting from a micro sd. I don't have a uboot on the emmc, but I do have one on the nmve. I bet if I can somehow move the boot partition to the emmc , and edit extlinux.conf, it will work.
"At this time, the Pinebook Pro ships with a Manjaro + KDE build with uboot on the eMMC. Its boot order is: SD, USB, then eMMC.
(An update has been pushed for the older Debian + MATE build that improves compatibility with booting other OSs from an SD card. In order to update, fully charge the battery, establish an internet connection, click the update icon in the toolbar, and then reboot your Pinebook Pro. Please see this log for details.)
Please note that PCIe, the interface used for NVMe SSD on the Pinebook Pro, is not bootable on the RK3399 and therefore is not a part of the boot hierarchy. It is possible to run the desired OS from NVMe by pointing extlinux on the eMMC to rootfs on the SSD. This requires uboot, the Kernel image, DTB, and extlinux.conf in a /boot partition on the eMMC."
"At this time, the Pinebook Pro ships with a Manjaro + KDE build with uboot on the eMMC. Its boot order is: SD, USB, then eMMC.
(An update has been pushed for the older Debian + MATE build that improves compatibility with booting other OSs from an SD card. In order to update, fully charge the battery, establish an internet connection, click the update icon in the toolbar, and then reboot your Pinebook Pro. Please see this log for details.)
Please note that PCIe, the interface used for NVMe SSD on the Pinebook Pro, is not bootable on the RK3399 and therefore is not a part of the boot hierarchy. It is possible to run the desired OS from NVMe by pointing extlinux on the eMMC to rootfs on the SSD. This requires uboot, the Kernel image, DTB, and extlinux.conf in a /boot partition on the eMMC."