In modern architecture, most of the system has some component of Asynchronous computing. Any application which you see has one versus other Asynchronous communications. Popular Examples of such applications are Video Streaming Services, where you stream the packet of data and then render it on client applications, Popular messaging applications, or any of the collaboration tools. These are just a handful of examples, but you can think of asynchronous communication anywhere where you are not transiting the data in the same request/response.
What Is Event-Driven Architecture?
Event-driven architecture can be visualized as a bunch of the applications module triggered by some kind of event, and then it processes and puts these events back into some place to be consumed by the other application.