I think I solved the second problem, it looks like the rootfs/uboot partition was not being populated because IMAGE_BOOT_FILES was not defined. This topic helped me solve that problem:
Though, it begs the question as to why the u-boot.bin file needs to be included in the rootfs? I suppose I’m confused by what is required and what is not based on the guide.
Do I need to define these?
MENDER_UBOOT_ENV_STORAGE_DEVICE_OFFSET_1
MENDER_UBOOT_ENV_STORAGE_DEVICE_OFFSET_2
If so, how does Mender use them?