What do you mean?
This doc you linked is from August.
The blog post from today includes, in fact at the very top an XCode Swift project emulating a Pixel 9.
The docs include a detailed Getting Started for Android and they even have an Android examples repo.
Hence the SDK.
By all means, it very much is possible to build Android Swift apps in XCode.
https://www.swift.org/documentation/articles/swift-sdk-for-a...