default or selected kernelversion does not have config value CONFIG_TSM_GUEST.
Result is shown for kernelversion 6.16-rc7

CONFIG_TSM_GUEST (not configurable)

configname: CONFIG_TSM_GUEST

Linux Kernel Configuration
└─>Device Drivers
└─>Virtualization drivers
└─>TSM_GUEST
In linux kernel since version 6.1.145 (release Date: 2025-07-14)