Are you using the devkit or custom board for Orin NX?
grep: : No such file or directory
No image is specified for ESP
From the log you shared, it seems something missing in your BSP pacakge.
How do you get the BSP package of JP6.2(/home/w/jp6.2/L4T-public-source/output/Linux_for_Tegra)?
Have you confirmed it working on your board (through flash directly)?
It is not valid to use image-based OTA to create new partition since OTA update would not re-partition the disk and the offset of each partition should be the same after update.