Android actually has one real way to build UIs — it's the views and the resource system. Everything else is just Google's abstractions over that, which are either beta or deprecated.
I'm not sure what kinds of tools do you expect. You do have to make layouts for different screen sizes, no real way around that. You'd usually want two breakpoints, so you have phones, small tablets (and foldable inner screens), and large tablets.
I'd like to see equivalents of UIKit/SwiftUI components that do most of the layout/navigation heavy lifting for you. For most apps, either the iOS 18+ UITabController or UISplitViewController comfortably covers every platform, orientation, and screen an iOS app can possibly run on with a tiny fraction as much boilerplate and manual ratcheting as is required in Compose.
There are, watch the "Strike a pose with adaptive layouts" video they posed yesterday (https://developer.apple.com/iphone-duo/). High level components like split views will adapt automatically, while things like scroll views won't, so there are new adaptive views (AdaptiveView, UIArrangementViewController) to help you move things around.
I'm not sure what kinds of tools do you expect. You do have to make layouts for different screen sizes, no real way around that. You'd usually want two breakpoints, so you have phones, small tablets (and foldable inner screens), and large tablets.