It may not be buried. I might have just turned it off. I always turn it off right away.
I consider pinging a major cause of paranoia (see NextDoor), an invasion of my community’s privacy, and honestly I live in a safe area and insurance covers everything anyway.
Synology's Security Station will 100% notify you.
https://www.synology.com/en-us/surveillance/feature/mobile
Synology + a cheap RTSP camera and it has all the features OP requires.
Well that's a crucial requirement. Should ping by default. Even if you can turn it on, I don't trust that they really put that feature first if it's buried in the settings.