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Most of the data is informational only, but two pieces are critical:
Board Name (address
0xd0)MAC address (address
0x20)
If the board name field is not correct, the Certified Ubuntu on Xilinx Devices image will not boot properly. The Certified Ubuntu release uses this data during its initial boot phase (the ImgSel tool) documented by Xilinx here: Booting Certified Ubuntu 20.04 LTS for Xilinx Devices . The ImgSel tool reads the board name and then uses this information to boot the correct BOOT.BIN file.
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https://github.com/Xilinx/embeddedsw/blob/master/lib/sw_apps/imgsel/src/xis_singleimage.c#L50
Using a Custom Device Tree
To temporarily override the dtb without modifying the fit image (Kria) or bootxxxx.bin (zcu10x), you can create a new dtb named "user-override.dtb". Copy user-override.dtb to the FAT partition and reboot. If user-override.dtb is found on the FAT partition by U-boot, it will use this dtb instead of the board-specific dtb found in the FIT image when Linux is started.