kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_ARCH_K3_J721E_SOC.
Result is shown for kernelversion 5.9.9

K3 J721E SoC

configname: CONFIG_ARCH_K3_J721E_SOC

Linux Kernel Configuration
└─> Device Drivers
└─> SOC (System On Chip) specific Drivers
└─> K3 J721E SoC

Enable support for TI's J721E SoC Family support