The app is excellent. We are just trying to add functionality, or at least get a reply as to why you cant add multiple recipients.
Your Phone Companion is now built into new Samsung Phones. Under Settings, find "Link to Windows". If the app has vanished from your Samsung phone, this is where it is. You can also search "Your Phone Companion" and the settings page is still there, but it has been turned into "Link to Windows".
If you are having an issue, cycle Link to Windows OFF and ON, and refresh Your Phone app on the PC.