No Android Studio 4 o design não exibe os campos de itens quando selecionado

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

    <activity android:name=".ui.activity.FormularioAlunoActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

        </intent-filter>
    </activity>

    <activity android:name=".ui.activity.ListaAlunosActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

</application>