Push and email notifications not coming through

I have the App set up on 3 devices, iPad and 2 iPhones and am only receiving notifications on the ipad, the 1st device I installed on. I tried the delete/advance date on my iPhone XR as suggested and it did restore notifications for a day but then they stopped again. I’m thinking the problem is trying to push to multiple devices. My iPad continues to get notifications as expected. Clearly something going on.