wake-ups tracking is also asked before: https://changemap.co/bearable-/bearable-roadmap/task/4324-sleep-update-add-multiple-sleep/

Another member of the community recently suggested something similar:

“Import sleep quality data.

It would be great to import sleep data from my Apple Watch, specifically time spent in REM, deep sleep, etc. That way I can track how getting more or less or certain sleep phases affects symptoms.”