A similar request (same subject) was declined in past because of missing support in iOS, but it seems to be possible to implement in iOS now.

I came across other 2 competing apps that support this functionality also on iOS, I also tested that. It is possible to add multiple action buttons in notification with custom names. These actions may call URL or make a HTTP request (e.g. POST request). Unfortunately Pushover misses this functionality (probably only this one, I have no other reasons to go with competitors).

Would you check it please, it seems it is now possible to

Please support live activities on iOS 16.