Battery Optimization disable
If Doze Mode is disabled on the device then I don't believe you'd need to also add any devices to the Battery Optimization list as Doze Mode will cover all apps.
We are still getting apps that are trying to use batter optimization. Users are getting popup notifications saying "If you want to receive calls and messages, you need to change your settings to turn off battery optimization". The app this is happening with is Cisco Jabber.