how to import selected private repo from a GitHub organization

[gitcommitshow]

I have installed the codesandbox GitHub app for a selected repository within an organisation.
But how do I work with it in codesandbox? Neither does it create the preview link comment on PR, nor it can be imported from the code sandbox dashboard. I tried oauth (via "update permission" in in the dashboard), but it leads to requesting permission for the private repo access to the entire organization, this is not possible for the current security policies, I can only grant private repo access to one selected repo only.