This feature would appear in the left “Launcher” tab you have shown as the first image on those docs.
I’d like to have a “custom” step after deploy, or even after Launch, at the end of the Project Launcher package toolchain.
Cook->Package->Deploy->Custom->Launch (The Package step is present in earlier/different UIs)
The Visual equivalent to this is called Post Build Event, which allows you to run an arbitrary command after an engine compile (i.e. update a web script / call a Jenkins job / etc)
Hopefully that makes more sense. However the automation testing docs are quite interesting.