@DM1919 Thanks for getting back to me and that screenshot! I wanted to try to lend a helping hand to see if we could sort this out from being anything other than an iOS issue, but it possibly may be, as iOS updates have stopped supporting iPhones that are below the 6S. You can read more about this from Apple directly here, as they state iOS 12.4.8 works on 5S and up, but the most recent iOS 13.7 and iOS 13.6.1 only work on 6S and later. Do you have an iPhone that is under a 6S? If you’re unable to upgrade your iOS to the most recent version, this may be why it’s not working with all the same features as compared to your iPad which is on the most up to date iOS.
Aside from the iOS side of this concern, could you also go into your iPhone settings > scroll down the bottom and select Ring > Notifications > and share a screenshot of what your settings look like under here? Lastly, please take a screenshot and share what App Alert Tone you have selected on your iPhone under the Ring app > main menu > Devices > Camera (you’ll need to check all of them) > Device Settings > Alert Settings > App Alert Tones and ensure you have something other than Silent selected here and the volume is turned up from here as well. This will be under Motions for your cameras in the App Alert Tone section.