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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] sys-process/nvtop-3.3.2::gentoo  USE="unicode" VIDEO_CARDS="-amdgpu (-freedreno) -intel -nvidia (-panfrost) -panthor" 310 KiB

Total: 1 package (1 new), Size of downloads: 310 KiB