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