HA features are available via Kubernetes framework. Having said that, there are few components which are not true HA in nature, foe example the IDM docker image. A fully-fledged HA framework is pplanned for the July release .
The concept of multi-tenancy will be replaced by namespaces and it is on the roadmap. HPE plans to support multiple namespaces for ITSM Automation, which will allow customers to create Dev-ITSMA, Cert-ITSMA & Prod-ITSMA namespaces with the same infrastructure stack.