Why not embedding a browser directly though?
How do you feel about the Flutter based UI Widgets? (https://github.com/UIWidgets/com.unity.uiwidgets)
In my experience there are two kinds of games: UI is the game or UI supports the game. When UI is the game, the performance bottleneck is almost always text rendering. From a DX POV there are many solutions, but from a performance POV, how can anyone compete with Skia or the native text APIs?