Umm...it's always been that way.
Actually, it hasn't.
You can set up an alert for when someone you share your location with leaves or arrives at a place. I will sometimes keep track of my Mom this way (and yes, she knows I do this).
On iOS 12.4 and iOS 13 B1 (possibly B2 as well), I'd set up some alerts and she wouldn't be bugged by a notification. On the recent beta, it tells me that she'll be alerted I set up an alert for her. She's on iOS 12.3, so she still has Find My Friends, not the Find My app, so she's obviously not getting these new alerts.
Some days, I'll set up multiple alerts, so this will be annoying to her. They need to allow you to customize whether you receive alerts, or allow you to customize for each user whether you want to be notified or not.
Yeah I’m curious if people still on iOS 12 will actually receive the notification.
Or if it’s even actually working yet on iOS 13.
He did not get a notification of any kind...he is on iOS12....
My guess is that people would need to be on iOS 13 and have the Find My app, as this is a feature of that app, not the Find My Friends app.