Bump. Been ~3 years and we still can’t do this.
I work with source engine builds more than launcher builds now. It’s frustrating having to download the entire engine, just so I can copy-paste the plugin into a source build, then uninstall it.
PLEASE Epic - Provide a “Download” option for plugins and content, do not require us to have the required engine installed. This is utterly infuriating UX.