One of the great features of the Fenix 6 is the ability to define power settings. It would be great, to define a power setting for the DND-Mode (or better night-mode) . So you could define by yourself, which features, services you want on the watch running during the night. I would personally switch Bluetooth of, which makes it a DND mode.
The advantage of this implemtatioon of "night-mode" would be, that it would be automatic switched on/off by the hours of the sleep-setting and it´s completely user configurable.
Bernd