These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.11 s (backtrack: 0/20).

[ebuild  N     ] x11-misc/xkeyboard-config-2.48::gentoo  USE="-test" 931 KiB
[ebuild  N     ] x11-libs/libxkbcommon-1.13.2::gentoo  USE="X -doc -static-libs -test -tools -wayland" 1215 KiB
[ebuild  N     ] dev-libs/libtsm-4.8.0:0/4::gentoo  USE="-debug -test" 153 KiB
[ebuild  N     ] sys-apps/kmscon-10.0.1::gentoo  USE="drm fbdev gles2 pango -debug -freetype (-libseat) -test" 1923 KiB

Total: 4 packages (4 new), Size of downloads: 4221 KiB