AEP -> ACS Real-time push notifications

Hi there,

We have a new use case to look into enabling real-time push notifications from a streaming (pubsub) data source into AEP, and then the push notification is delivered via ACS (we are not on AJO). 

I found this article but it's 3 years old, I am wondering if there are new ways to accomplish this?

https://experienceleaguecommunities.adobe.com/t5/adobe-experience-platform/how-to-use-api-call-to-send-data-from-aep-to-acs/m-p/375739#M49

Thanks