As suggested by @aspiers in #6: Deployment Reviews as a potential workaround option for getting previews from forks by blocking the preview behind a manual review step, with information about the risks
Native GitHub feature that blocks a specific workflow from running until manually approved
Documentation is not 100% clear on whether it's a free feature / if it will work in free private repos
Totally unmentioned how to implement/configure the feature - can I pass a message explaining the risks?
As suggested by @aspiers in #6: Deployment Reviews as a potential workaround option for getting previews from forks by blocking the preview behind a manual review step, with information about the risks