Android/app/src/main/res/layout/progress_card.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:parentTag="com.google.android.material.card.MaterialCardView"
    tools:visibility="visible">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="24dp">

        <com.google.android.material.progressindicator.CircularProgressIndicator
            android:id="@+id/progress_card_child"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/transparent"
            android:indeterminate="true"
            app:indicatorColor="@color/signal_colorPrimary"
            app:layout_constraintBottom_toTopOf="@id/progress_card_text"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/progress_card_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            app:layout_constrainedWidth="true"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/progress_card_child"
            tools:text="Loading..." />
    </androidx.constraintlayout.widget.ConstraintLayout>
</merge>