CONFIG_LAZY_FPU is not available for thedefaultarchitecture x86.
Result is shown for architecture nds32
default or selected kernelversion does not have config value CONFIG_LAZY_FPU.
Result is shown for kernelversion 6.9.2

lazy FPU support

configname: CONFIG_LAZY_FPU

Linux Kernel Configuration
└─>lazy FPU support
In linux kernel since version 5 (release Date: 2019-03-03)  
Say Y here to enable the lazy FPU scheme. The lazy FPU scheme can
enhance system performance by reducing the context switch
frequency of the FPU register.

For nomal case, say Y.