The reason why Electron exists is that it is able to directly turn existing web apps or anything using the Chrome APIs into desktop apps and being compatible with the wider Javascript ecosystem as well with little effort other than adapting to the desktop. I don't think that it is possible with this or Tauri unless you want to rewrite the whole thing and not depend on Chromium APIs.
A great alternative would be compatible with these Chromium APIs and allow an easy migration off of Electron but that is not going to happen anytime soon.
Either way, I'd rather see Flutter Desktop as a suitable competitor and a possible alternative to Electron desktop apps rather than these webview-based alternatives.