The publisher app (source app) should add all ad networks’ SKAdNetwork IDs to its info.plist file. Below is an SDKAdNetwork info.plist file example, supporting new Apple requirements:
<array>
<dict>
<key>SKAdNetworkIdentifier</key>
<string>Network1ID.skadnetwork</string>
</dict>
<dict>
<key>SKAdNetworkIdentifier</key>
<string>Network2ID.skadnetwork</string>
</dict>
</array>
You should use SKAdNetwork IDs from our list of SKAdNetwork IDs on the main page.