These projects make use of OPA APIs to manage and update external data. See External Data for more information about this functionality.
The OPAL Client uses the OPA REST API to update the state pushed down from the OPAL server. See how this works.
OPCR policy images can contain data as well as policy. If you need to distribute data to OPA from an OCI registry, OPCR can build and push such images. See the docs for building images here.