The answer is NO.
Reolink Client and Reolink App are specially designed for Reolink products and can be downloaded for free on Reolink's official website. However, they might not be compatible with the cameras and NVRs of other brands.
Therefore, it's not advised to add 3rd-party cameras or NVRs to Reolink Client/App. You may go to the official website of your device to download the corresponding software, on which the compatibility of your device is ensured.