Read the Docs PR previews missing from version listings

Read the Docs provides the ability to generate documentation previews for pull requests, allowing contributors to verify changes before they are merged into the stable or latest branches. These previews are typically triggered via webhooks and configured through the project's YAML file or dashboard settings.

There is uncertainty regarding the visibility and discovery of these temporary versions. While a preview may be successfully built and accessible via a direct link provided in the pull request, it may not consistently appear in the version flyout menu or search results, leading to ambiguity about whether the version is active or has been purged by retention policies.

• Does the platform support a configuration to make PR previews discoverable in the global version list?
• What determines if a preview version remains listed after the associated pull request is closed or updated?