The recently pushed UI/UX changes to the Sleep tile on the Dashboard are terrible.
Until the new changes, editing Sleep on a Desktop was relatively easy, as it could be done from the Dashboard tile. The linear chart was helpful because users could see the sleep pattern and be aided in guesstimating the approximate time of falling asleep and waking up, based on the points shown in the line chart.
Then the Edit function was removed from the Dashboard tile, necessitating a click to go to the full page Sleep view. But sleep view showed only a column chart (like in mobile view), which is much less helpful identifying the point of falling asleep and waking up.
Now the line chart has been completely removed and replaced with a donut chart on the Dashboard tile, and there is a column chart on the full page. So Garmin made it much more difficult to edit one's sleep times based on memory and removed the visual aid of the line chart.
Given the terrible "accuracy" of Sleep tracking, this is literally adding insult to injury. Either fix the Sleep tracking and make it accurate or at least don't make it so difficult to edit the consistently inaccurate Sleep tracking.