Radxa 5b - where do I start? - 5 major problems?

[Eric_Woudstra]

5. NVME Boot and SD not working, see here:

How to change boot device?

Check here (stable-5.10-rock5 branch): Even if your device starts with SD (as it always should if it is a valid SPL boot.) then U-Boot get’s started from SD card. But then: It seems then that NVME is checked first, only for presence, and if present chosen as boot device. I would change the order here and build a new u-boot and write it to SD card, If I were you.