Please go back to previous post and use similar method to check things again…
Your flash log gives this:
copying pinmux_config(/home/jetson/Jetson_RT/Linux_for_Tegra/bootloader/generic/BCT/tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi
Which means your pinmux is not tegra234-mb1-bct-pinmux-p3701-0000.dtsi…