Do you not have to be online at a certain time when remote?
I’ve been remote for 6 years now, and did it on and off for a while before that. I’m still woken up by an alarm clock, because I can’t get myself to go to bed at a reasonable time, but have to be online for meetings and stuff and 9am… I think many would prefer 8am, but that’s just a symptom of a broken meeting culture.
For me I just wake up at about the same time every day, and that is ahead of anything on the schedule. It isn't like you might end up sleeping another couple hours. I physically can't sleep past 8 hours or so.