Combining Native UI and Web into a single app

I'm looking to embed an existing C++ open source desktop app into a new app where all the new components are written in web. I want to be able to keep the full high performance of the native app. Ideally I would run all components in a single window (the native app would look something like a web card) and even allow the user to be able to move the components around. What options would I have here? I was looking into React Native, Flutter, and Wails. It looks like I would have to fork Wails to get it to work. I'm not sure about the others but from a quick look, it doesn't seem like they are designed to be able to run UI code written as native.

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