I have created a patch, fairly sizey one. We had a client that asked to be able to export all "child content" mean all referenced entities.
This patch adds a third form, that displays on a local task tab on content entities, simply clicking the export button creates an archive the that content and all it's related content.
Feedback more than welcome.
Needs review
4.0
Export
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It's likely this issue predates Contrib.social: some issue and comment data are missing.