May I know if there is any documentation that explains the Preview APIs? There are a few of the Conversations Preview APIs that I am keen to find out more:
The Preview APIs (or API in preview) relate to features which are not Generally Available yet - i.e. the feature is not released yet/feature to be coming soon.
"Limited Access and Breaking Changes
The API resources on this page are available in a limited capacity as a preview of resources that are intended to be released publicly at some point in the future. Access to these resources is often restricted by feature toggles enabled on a per-org basis. These resources are subject to both breaking and non-breaking changes at any time without notice. This includes, but is not limited to, changing resource names, paths, contracts, documentation, and removing resources entirely."