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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] acct-group/unbound-telemetry-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-group/unbound-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-user/unbound-telemetry-1-r2::gentoo  0 KiB
[ebuild  N     ] app-metrics/unbound-telemetry-0.1.0_pre20210920-r1::gentoo  USE="-debug" 17203 KiB

Total: 4 packages (4 new), Size of downloads: 17203 KiB