Have you tried activating the plugin in the Plugin Manager (Settings > Plugins)? It is located under Built-in > Editor, search for the ‘Polygon Editing’ plugin. It might be unstable though, as it is still in beta (at the time of writing), and was just recently added with 4.23, if I’m not mistaken.
I don’t have the edit mode toolbar that allows you to edit mesh faces/verticles in the static mesh editor, there are multiple unreal videos and docs about ti but no where does it tell you how to enable it.
What does that mean? Is that an entire separate thing from the options you get in the beginning? I ran off a blank template and my project is like 25% done so fml.