Awesome, I haven't heard of this new output. Do you have a link to any info on that release?
I was also just shown by a friend that Fitbit's algorithm offers two modes (Normal and Sensitive tracking) on their app. So for each night, you can see two different sleep phase timelines based on which algorithm you choose. I'm looking into adding this as well.
I didn't have a Garmin device and, in my research, it didn't seem quite popular enough to be of interest. I am all ears for model recommendations, however.
Lastly -- any and all your questions are appreciated, so no worries! Thank you for asking