My point it's that you said you changed from QT to Tauri because of being able to use frontend frameworks but QT also allows you to do the same. Anki does something like that, but since you mentioned rust that might be the reason of the change to Tauri.
But why would you pull in an entire UI framework, QT, just to use its webview? If it’s not clear, these are local apps we are talking about. The webview loads local content. This is what tauri does.