v20200211 on SDcard as is (only replace config to rk3399-rock-pi-4.dtb)
Did I understand correctly that you didn't add a u-boot to the SD card and the system started with the current u-boot ?
p.s. with fdt others versions strings "pci" and "nvme" in dmesg are missing
Use the latest versions, where NVMe is defined on RockPI4b.
Which dtb do I have to use for h96 max rk3399 box?
I don't have such equipment, I don't test it.
Install2emmc script no longer works.
The image contains incorrect scripts. This has been fixed in the new images.