I don’t know much about WebSphere Business Events. I assume that allows you to generate CEI business events and then take actions based on the content of the messages.
It is currently not eclipse based and required WAS v22.214.171.124.
It has connector and Data Mapping capabilities, which make it sound very similr to the WebSphere Process Server stack.
Consists of the WBE Design Environment for development and the WBE Object Repository for data storage.
Like CEI, it’s not to be used for IT events but rather ‘business’ events due to server resource concerns.