CONFIG_RISCV_SCALAR_MISALIGNED is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv

CONFIG_RISCV_SCALAR_MISALIGNED (not configurable)

configname: CONFIG_RISCV_SCALAR_MISALIGNED

Linux Kernel Configuration
└─>Platform type
└─>RISCV_SCALAR_MISALIGNED
In linux kernel since version 6.13 (release Date: 2025-01-19)  
Embed support for emulating misaligned loads and stores.

selects
CONFIG_RISCV_MISALIGNED
CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW