I'm on Verizon so I don't have this feature but agree it would be useful. I have just begun playing around with Bixby and the quick commands and one of the first ones I created is called "Good morning, Bixby". When I say this in the morning (after saying "Hi Bixby" to activate the voice prompt) Bixby does the following in sequence:
Turns off the Do not disturb
Shows days calendar
Shows reminders
Shows today's weather
Restarts phone
I'm still working on tweaking this but it did work this morning. When Bixby hears "Restart phone" it prompts you verbally say "restart" to get it do reboot. So if you use Bixby you could just say "Hi Bixby" and then "Restart phone." Not quite the automated thing you were looking for but if combined with some other daily (weekly) tasks it's a least a head-fake in that direction! As much as I love Verizon, they really do some annoying stuff.