Thank you all guys.
I tried another way, and finally successfuly boot from NVMe.
For others whoever might have this situation, I leave a note here.
Get the official Radxa OS for rock (5c|5c lite).
Get the vendor Armbian for rock (5c|5c lite).
Make a sd card with Radxa image.
Plug sd card into PC(not Rock 5c), and copy Armbian img file(ex. Armbian_25.11.1_Rock-5c_trixie_vendor_6.1.115_minimal.img) to the sd card(to /home/radxa or wherever).
Boot Rock 5C(lite) with the sd card.
Login to Radxa OS, run rsetup and set overlay with SPI boot loader. Reboot.
run rsetup again, and update the SPI Bootloader. There are 2 bootloader options, rock 5c and rock 5c SPI bootloader, and I chose SPI bootloader.
Then, dd Armbian Image to NVMe device. There's a Instructions. (dd if=Armbian_xxx.img of=/dev/nvme0n1 bs=1M status=progress)
Power off, remove SD card and Power On!
You can boot from NVMe!
