I’m still unclear of your issue, but whenever your zmodo camera detects motion, the zmodo app will push an alert to your phone and sound per your phone settings. The default notification settings of your phone shall apply unless you have an app that is removing your “junk” notifications or you have disabled the zmodo notifications within the android settings.
On my Pixel 2 XL and Moto X Pure, notifications work perfectly when the camera sees motion by triggering an alert on the notifications drawer and a ring alert sound. When phone is set to vibrate, the notification will pop up and vibrate.
I dont believe the zmodo app has the capability to send text messages or emails when motion is detected.
See my screenshot below of a notification that I see when motion is detected.