To embed a WebApp you can get the Embed URL, iFrame URLs by clicking on Embed within the Timeline view. Note that URLs can either reference a specific Event or a Project. If the latter, the latest Event to go live will be targeted.
This functionality is not supported when the App is a native app, chatbot or other interfaces other than WebApps
This feature can be configured via the App Spec.
In order to embed an individual Element published in an Event, visit Embedding an Element guide.