IssueTracker

ConstraintLayout version: 2.0.0-beta1

<androidx.constraintlayout.helper.widget.Flow
        android:id="@+id/buttons"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:constraint_referenced_ids="b_create_code,b_enter_code"
        app:flow_verticalGap="@dimen/space_2"
        app:flow_verticalStyle="packed"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@id/end_buttons"
        app:layout_constraintHeight_min="wrap"
        app:layout_constraintStart_toStartOf="@id/start_buttons"
        app:layout_constraintTop_toBottomOf="@id/scroll" />

<Button
        android:id="@+id/b_create_code"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/pairing_create_code"
        tools:ignore="MissingConstraints" />

<Button
        android:id="@+id/b_enter_code"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/pairing_enter_code"
        tools:ignore="MissingConstraints" />

The buttons has text aligned to the left. Setting gravity or textAlignment changes nothing.

The @id/end_buttons and @id/start_buttons are vertical guidelines with percents.

Also, setting app:flow_horizontalAlign="end" changes only the second button, and also chenges it's width, which is probably another bug.