It states in the wiki the factory 'boot instructions' are on the eMMC.
That guides it to 'boot' from the sd card first, if one is inserted.
If you have flashed the SPI, that should have included perhaps boot sd card first and your NVME second ?
Then without an sd card it will boot first from your NVME.
That guides it to 'boot' from the sd card first, if one is inserted.
If you have flashed the SPI, that should have included perhaps boot sd card first and your NVME second ?
Then without an sd card it will boot first from your NVME.