How can i override activity lifecycle methods in a composable? i've a composable called "HomeScreen" now i want to have all activity lifecycle methods in it. Currently i've ios and android in commonMain.

in iOS where are no Activity. Is's analogue calls UIViewController. For Android you can read Android docs. You need to use Lifecycle callbacks. https://developer.android.com/guide/components/activities/activity-lifecycle For iOS you can use this approach:

ComposeUIViewController(
    configure = {
        delegate = object: ComposeUIViewControllerDelegate {
            override fun viewDidLoad() {
                // Some reaction
            }
            override fun viewWillAppear(animated: Boolean) {
                // Some reaction
            }
            override fun viewDidAppear(animated: Boolean) {
                // Some reaction
            }
            override fun viewWillDisappear(animated: Boolean) {
                // Some reaction
            }
            override fun viewDidDisappear(animated: Boolean) {
                // Some reaction
            }
        }
    }
) {
    Text("Here your Compose code")
}