To get the visualisation going, you'll need NuGetForUnity

To set it up:

1. Open Package Manager window (Window | Package Manager)
2. Click + button on the upper-left of a window, and select "Add package from git URL..."
3. Enter the following URL and click Add button

https://github.com/GlitchEnzo/NuGetForUnity.git?path=/src/NuGetForUnity

Next, install YetAnotherHttpHandler, again using the "Add package from git URL..." option

https://github.com/Cysharp/YetAnotherHttpHandler.git?path=src/YetAnotherHttpHandler

After a restart, the nuget option should be available in unity, and all needed packages installed when building