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

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] net-libs/libnatpmp-20230423-r1::gentoo  26 KiB
[ebuild  N     ] acct-group/transmission-0-r3::gentoo  0 KiB
[ebuild  N     ] app-arch/libdeflate-1.25::gentoo  USE="utils -test" 193 KiB
[ebuild  N     ] net-libs/miniupnpc-2.3.3-r1:0/21::gentoo  USE="-verify-sig" 138 KiB
[ebuild  N     ] acct-user/transmission-1-r3::gentoo  0 KiB
[ebuild  N     ] net-p2p/transmission-4.1.2::gentoo  USE="nls -appindicator -cli -debug -gtk -qt6 (-systemd) -test" 11567 KiB

Total: 6 packages (6 new), Size of downloads: 11924 KiB