There is https://github.com/JinShil/BlazorWebView which allows using a Blazor App inside Webkit.
Consider if there should be something similar for Gir.Core and if it should be part of Gir.Core.
Some work was done to port it to use Gir.Core: https://github.com/czirok/BlazorWebView/tree/gircore4 / https://github.com/badcel/BlazorWebView
Alternatively link to the project on the homepage.