Jetpack Compose: ignoring descendants' content description

Question

Let's say I have a Column with Rows. Each Row is a logical unit and I want Talkback to navigate through the Column Row by Row, without selecting and descendants of the row. That's easily achievable with mergeDescendants = true

Now, I have a tailored contentDescription for the Row, that provides a more natural description. How do I ignore the descendant's text to be read, to prevent doubling the information?

tl;dr: When using mergeDescendants; how do I make Talkback replace rather than merge the descendants' contentDescriptions?

@Composable
fun Greeting() {
    // Goal: Each row is a single entity for talkback, that has a content desccription describing the entire tow
    // descendants should not be focused when navigating by swipe w/ talkback
    // "Greeting for Android X" should be read, descendants should not be read automatically.
    Column(modifier = Modifier.padding(20.dp)) {// Screen padding
        Box(
            // "greeting for Android 1 ... Hello Android! ... How do you do?" :-(
            // descendants can not be selected individually :-)
            Modifier.semantics(mergeDescendants = true) {
                contentDescription = "greeting for Android 1"
            }
        ) {
            Row {
                Text(text = "Hello Android!", modifier = Modifier.padding(32.dp))
                Text(text = "How do you do?", modifier = Modifier.padding(32.dp))
            }
        }
        Box(
            // "greeting for Android 2" :-)
            // descendants will be traversed next :-(
            Modifier.semantics {
                contentDescription = "greeting for Android 2"
            }
        ) {
            Row {
                Text(text = "Hello Android!", modifier = Modifier.padding(32.dp))
                Text(text = "How do you do?", modifier = Modifier.padding(32.dp))
            }
        }
        Box(
            // "greeting for Android 3" :-)
            // descendants can not be selected individually :-)

            // When using tap to speak rather than swipe, it is hard to select the row:
            // Only when tapping empty space will the row be selected.
            // When tapping either text element,nothing happens. :-(
            // Expected: the row is selected and "greeting for android 3" is read when 
            // I tap anywhere inside it's bounds
            Modifier.semantics {
                contentDescription = "greeting for Android 3"
            }
        ) {
            Row(Modifier.clearAndSetSemantics {}) {
                Text(text = "Hello Android!", modifier = Modifier.padding(32.dp))
                Text(text = "How do you do?", modifier = Modifier.padding(32.dp))
            }
        }
    }
}