Unable to put forked repositories in GitHub project preview?

[jonas4climate]

I noticed that when manually selecting projects that were forked, they don't show up in the GitHub project overview. Is this intended? I noticed also GitHub itself prevents pinning of forked repositories, perhaps that relates to this.

Code:

manual: {
  // Properties for manually specifying projects
  projects: [
    'jonas4climate/opinion-formation-complexity',
    'jonas4climate/metabolic-cellular-modelling', // Forked repo
    'jonas4climate/galaxy-zoo',
    'jonas4climate/modelling-natural-processes',
    'jonas4climate/numerical-algorithms-practice',
    'jonas4climate/learn_fourier',
  ],
},

Resulting webpage:

See my repository for reference on the config file: https://github.com/jonas4climate/jonas4climate.github.io

[arifszn]

Can you please share the forked repo's link?

[jonas4climate]

Sorry, my mistake... The original fork was private hence so too is my repo