[yAak]

From what I've read, SwiftUI is using parts of UIKit under the hood, so it also doesn't seem too likely.

[wahnfrieden]

Yes historically but not by design. It's more of a transition tactic.

Starting with iOS 26, new UIKit and AppKit features are implemented by "native" SwiftUI (specifically, Liquid Glass's implementation). In recent years they have also been replacing UIKit/AppKit-backed SwiftUI views with "native" SwiftUI implementations.

But besides this technical change I don't think Apple has any desire to bring SwiftUI to other platforms.

BTW: https://skip.tools has bridged it to Compose. Your SwiftUI code runs in native Swift on Android.