While one of my deeplinks is working, the other one is not

Question

The deeplink I wrote this way works without any problems.

<intent-filter>
    <action android:name="android.intent.action.VIEW" />

    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />

    <data
    android:host="giris.example.com"
    android:scheme="https" />
</intent-filter>

but this deeplink is not working. The application does not open.

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />

    <data android:scheme="example.app" />
</intent-filter>

I read dozens of content on stackoverflow but could not find a solution.