Hi otischung0321,
No, please just refer to the steps in Kernel Customization — NVIDIA Jetson Linux Developer Guide 1 documentation to run cp commmand to copy dtb under kernel-devicetree/generic-dts/dtbs/ to Linux_for_Tegra/kernel/dtb/.
The dtb in use is depending on the board config. (you can check the board config or flash log to know what’s the final dtb loaded for your board). It may load lots of dtbs and combine to one dtb (dtbfile).
The DTB may also not be loaded from the /boot. You can refer to DTB Support for details.
As a result, you can not just copy them from your BSP package to the board directly.
Please refer to the developer guide to copy the generated dtb to correct path and reflash the board to apply the change.