Usually in .NET you typically get IE, not Edge. People have been using CefSharp as a replacement. A number of software I have contributed to have done this.

In contrast, UWP applications do use the Edge rendering engine, and while it may or may not be possible to use CEF in these applications, you won't be able to get it certified by Microsoft, therefore no one, at least to my research, has bothered doing so.

I wonder what the future brings with Edge now just being chromium based