As of today, most of the audio routines can only be run from one device. Any routine should be able to be run on all devices at once. For example, playing a sound on a schedule.
It would be really great to choose to hear "Routines" on all Alexa devices, not just in one room
Andrew R Duncanson commented
I like using routines for reminders especially now with the kids doing school from home but I end up having to make four routines for each reminder so that they play on all devices. Ideally there would be a list of devices to run the routine on and we could check a box next to one, multiple or all devices.