In the app, it looks like it has been updated. When I go to my devices, nothing shows up and it says I have no devices. However, when motion is detected, I can click on the notification and see the recording from whichever camera was triggered. However, since no devices show up, I can’t see the camera view if there was no motion triggered. I don’t have access to the location so I can’t do anything physically with the camera or base station. This bug seems like it was introduced with the new app update.
When I go to settings, my cameras show up there, but not on the Home Screen.
Check out this link on the forum that’s supposed to help you get your devices back after the update done messed 
things up…
Tips for eufy Security App v4.0 - News - Eufy Security Collective?