Inherit NuGet package from another project in the solution

I am trying to have a centralised single project in my solution which references NUnit (called NUnitHelper). Within this project I will add my own wrappers to some NUnit classes and Attributes.

What I want to do is for the other projects in my solution I would like to inherit NUnit from the NUnitHelper project rather than having direct references to the NUnit NuGet package all over my solution.

I am using VS2019. I have found that there used to be a way to do this in the past in that Package Manager had a 'manage' button for each NuGet package that allowed distribution, but this option is not visible for me. TIA.