I haven't figured out yet how to add pushover to my mobile phone running Ubuntu Touch. I could run the android APK in a container but then don't get the push notifications, which kinda defeats thepoint. Expect the same is true on all Linux Phones and my browser isn't one of the supported ones for the desktop version. 

macOS 15.1 stopped displaying Pushover notifications from iPhone. I read somewhere devs have to update their apps. I wish I had more information.

if you go into system settings > notifications > allow notifications from iPhone > mirror iPhone notifications from >

pushover doesn't show up on the list