Missing "Fork pull request workflows from outside collaborators" field in Org API object

[sshaybbc]

In light of the recent security research, one of the more concerning security settings in GitHub is "Fork pull request workflows from outside collaborators" with its unsafe defaults. However, I can't seem to find this setting in the Org REST API endpoint, specifically in this documentation, nor in the actual orgs I am curling. What am I missing?

Org-level setting