Posting an updated Answer to the question (APIs were renamed in Compose Beta)
@Composable
fun AutoFocusingText() {
var value by mutableStateOf("Enter Text")
val focusRequester = remember { FocusRequester() }
TextField(
value = value,
onValueChange = { value = it },
modifier = Modifier.focusRequester(focusRequester)
)
LaunchedEffect(Unit) {
focusRequester.requestFocus()
}
}