Deployment issues with NuGet packages- Help wanted

Apologies if I've gone the wrong way in going about this...

I've started using the ExcelDNA package in a NetFramework 4.7.2 project using a packages.config approach (as per the guidance). The majority of the project dependencies are NuGet packages. There are no project references.

My debugging experience is great - no issues. However, upon deployment to Excel the functions do not work unless dlls are added alongside the xll file. My understanding is that this shouldn't be required unless packaged incorrectly. The pack log in the output window shows success with no issues.

At this point, I have not made any updates to the .dna file. Presumably, I should not have to duplicate everything in my packages.config by adding manually into my .dna file? Is there something that I'm missing?

Any help much appreciated.