I need to activate tristate support in Buildroot to further expand the functionality, but I'm new and I can't figure out how to activate this feature, as well as why even if I write my simple KConfig with only 1 tristate option, when running kconfig-mconfig I can still only select y/n
It turns out I just needed to add
config BR2_MODULES
bool "Modules support"
option modules
to a file Config.in after that, tristate is safely displayed in make menuconfig