How to load nuget packages dynamically?

I have created a nuget package using unity framework and it is running well on a device. But the problem is I cannot run it on a simulator because, in unity I have set the target SDK is to "Device SDK". Either Device SDK or "Simulator SDK" can be selected at a time. So my thought is to create 2 versions of nuget package for device and simulator and dynamically load it according to the target(simulator or device). I want to know

1. Is this even possible?
2. If this is possible, how can I do that?

Thanks in advance.