I think the part @carverofchoice may have left out is the actual Sleep as Android app, which is from Urbandroid Team (at least I think that’s what he’s describing). I’ve played with it a little but haven’t really done a deep dive into the features. What I really like from that developer is the Twilight app, which has been my favorite blue light filter for years. When I’m using that and start to read an e-book at night in bed, my eyes become so relaxed that often I can read only a few pages before I have to just put the tablet down and sleep. It’s very effective. 
That’s really cool, and the examples you mentioned are another compelling reason to try Home Assistant at some point! 
I’m a user of a Wyze device that stopped synchronizing sleep (and other) data on 1 April 2025. Other affected users and I have submitted logs and opened tickets with Support. (I’ve had two for this issue so far and walked away after the last response to my second ticket because the reply I received was so pathetic and infuriating: The Support agent clearly responded with a template and didn’t even bother to edit out the “XXX” and replace it with the product/problem. I even considered pasting it to Support Shoutouts – Real Stories from Our Users 💬 because it’s so bad.) Despite this, I have yet to see even a hint of a resolution to the problem, which I believe to be server-based, as I’ve repeatedly described in my tickets. 