@Terri, are you using Fully Kiosk Browser to host your dashboard? If so, you can follow the steps below to install the SmartThings community developed Fully Kiosk Browser Device Handler and configure the Remote Admin settings.
Once done you can create the rule below to open the Ring app when the motion is detected. The down side is it won’t open the specific camera’s streaming page in the app directly and you will have to tap the specific camera in the app.
URL:
intent:#Intent;launchFlags=0x10000000;component=com.ringapp/com.ring.launch.LaunchActivity;end
If you are using a Fire tablet, you can also enable Alexa and try the trick to use Alexa Routine to show the camera view when motion is detected. See below.