Did you set the startup after correctly? If your app is running and you set the security, it seems that your Startdeeplink microflow is not called.
Please check the documentation here: https://docs.mendix.com/appstore/modules/deep-link:
/link/ path needs to be added as a request handler in your application. This will be covered when you add the DeepLink.Startdeeplink microflow to the startup microflow of your app.
Have you created Deeplink microflow in the NV_Home page and checking whether it’s deeplink or not?
And if it’s not deeplink, have you configured respected landing page ?
In the default home page, you need to create one microflow. Have you done that?