In another two months I will also be getting started with angular 10 probably. I proposed an upgrade with the next gen UI and we got approval. I have to do a POC in another two months. Our legacy code is also in ASP.NET but I'm not going to be converting it instead I'm going to rewrite the whole application in the new technology stack.
In our case for the UI components like date picker etc, we have a framework already available customized for our company. Built on top of Bootstrap. So building a UI should be pretty much simple for me. But ya have to get my hands into this after two months. If I need any help, I'm going to bug you. ð