Man pages matching name kconfig-merge in section 1:

kconfig-merge.1.en	debian 10 / kconfig-frontends
kconfig-merge.1.en	debian 11 / kconfig-frontends
kconfig-merge.1.en	debian 11 / kconfig-frontends-nox
kconfig-merge.1.en	debian 12 / kconfig-frontends
kconfig-merge.1.en	debian 12 / kconfig-frontends-nox