Actually, with the new app update, it looks like they added this feature to allow you to set the motion alerts and monitoring more spedifically when in Home or Away mode.
For us, we went into the Mode Settings in the specific motion detector and was able to select how we wanted the motion to detect. In the new app update, you can select the motion to arm and monitor in both home or away mode.
This is what we wanted to achieve as now we have more options in how we wanted the motion sensor to alert and monitor. Thanks Ring for listening and always improving! 