Project board not visible in repository

I have created a project board on GitHub and successfully linked it to 2 repositories. Everything is working fine and as it is supposed to.

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However, the project board is not showing up in the Projects tab of either of those 2 repositories:

The project board is located here: Rema (github.com).

As you can see, the repositories are successfully linked to the projects, but the projects themselves are not showing up inside the repositores.

Am I doing anything wrong?