The main change is that for M2K, following https://github.com/rhdhorchestrator/orchestrator-helm-operator/tree/main/docs/main/kafka-knative-broker is a pre-requisites as the eventing spec has to be set manually to the SonataflowPlatform and therefore a broker must be there too. The link uses a Kafka broker but an in-memory broker can be used too. AS per https://github.com/rhdhorchestrator/serverless-workflows-config/pull/998.
https://github.com/rhdhorchestrator/orchestrator-helm-operator/pull/498