To resolve the issue of not being able to add additional cameras in the Link2Home app because surveillance cameras are not showing as an option, follow the steps below:

1. Verify App Version: Ensure you are using the latest version of the Link2Home Pro app. Updates can introduce new features and fix bugs that may prevent adding cameras. Check the App Store for any available updates.

2. Login or Register: Make sure you are logged into your account or have created an account in the Link2Home app. This is essential for managing devices. If necessary, log out and log back in to refresh your session.

3. Check Hardware Compatibility: Confirm that the cameras you are attempting to add are compatible with the Link2Home app. Some models may require a different app or may not be supported. Ensure you have the correct camera model that works with Link2Home.

4. Use the Auto Scan Feature:
- Open the Link2Home Pro app.
- Go to the device management section.
- Look for an option called "Add Device," then choose "Auto Scan." This should help the app locate compatible cameras in your local network automatically while following instructions provided in this YouTube tutorial - [learn more].

5. Manually Add Camera: If the auto scan doesn't work, you can manually add the camera:
- Under the device management section, select “Add Device” and choose the option to add manually.
- Follow the prompts to enter the camera's details, including its IP address if prompted.

6. Check Network Settings: Ensure that your Wi-Fi network settings are correct. The devices must be connected to the same Wi-Fi network as your phone. Check if there are any firewall settings that might be blocking the camera from being added - learn more.

7. Reconnect Devices: If the cameras are still not appearing:
- Unplug the cameras from their power source, wait a few seconds, and plug them back in.
- Restart your router to refresh the network.

8. Contact Support: If none of these steps work, consider reaching out to Link2Home Customer Support for further assistance. They might be able to provide specific guidance tailored to your setup.

Following these steps should assist you in adding additional cameras to the Link2Home app effectively. If any particular step does not yield results, consider checking the compatibility of your hardware and ensuring all devices are properly powered and connected.