How to update deployed Asp.Net Core applications?

Question

IIS

There is an Asp.Net Core application. It is deployed on the IIS server.

We need to add new functionality to a part of the application. For example, a C# library that is used by the application's views and that does not affect the core application itself. Are there techniques to update a particular library without republishing the entire application? Of particular interest are the Razor Class Library libraries.

(previously, Asp.Net MVC had the ability to update nuget packages directly on the deployed application. Did I understand correctly that this is no longer possible?)

UPD:
The application uses Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation and changes are made directly to views deployed on the server. Therefore, the approach of updating only individual modules (for example, RCL), and not the entire application as a whole, is interesting.