What it does
SAP's list of CAP Java modules gives this feature one line, intra-application messaging with Apache Kafka, and its POM depends on the Apache Kafka client library. capire's Java messaging page documents Maven dependencies and a kind for SAP Event Mesh, SAP Cloud Application Event Hub, advanced event mesh and Redis, and none for Kafka. Whether the feature subscribes to a topic that another system writes to, and how it is configured to do so, is not documented.
Remaining work
Not established. The configuration would have to be read out of the module itself.