Possibly, but that's if you include the part about making it look/feel native. If you just provide the tools the are just focused on the language and framework and let the people who care about making it look native on whichever platform it's running focus on that then I think it's doable.
Unlike things like react native you wouldn't be actually using the native components necessarily unless you can implement the UI frameworks components in terms of them. Otherwise they would need to be written from scratch.
I’ve thought enough about this problem that I don’t think it’s possible to recreate a “native” experience with a cross-platform app. You end up compromising on the nativeness every time. It makes more sense to me to use native GUI frameworks and program your functional logic in something like Rust.
A native look and feel is definitely an implicit assumption I held. You’re right that eliminating this requirement changes the level of difficulty significantly.
Unlike things like react native you wouldn't be actually using the native components necessarily unless you can implement the UI frameworks components in terms of them. Otherwise they would need to be written from scratch.