您可以从LocalContext获取当前活动，然后更新requestedOrientation。
要在屏幕出现时设置所需的方向，并在屏幕消失时将其恢复，请使用DisposableEffect：

@Composable
fun LockScreenOrientation(orientation: Int) {
    val context = LocalContext.current
    DisposableEffect(orientation) {
        val activity = context.findActivity() ?: return@DisposableEffect onDispose {}
        val originalOrientation = activity.requestedOrientation
        activity.requestedOrientation = orientation
        onDispose {
            // restore original orientation when view disappears
            activity.requestedOrientation = originalOrientation
        }
    }
}

fun Context.findActivity(): Activity? = when (this) {
    is Activity -> this
    is ContextWrapper -> baseContext.findActivity()
    else -> null
}

用法：

@Composable
fun Screen() {
    LockScreenOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)
}