I can see such pie charts for as early as late June 2016. As you can see from the fourth set of screenshots I posted in this reply over in another thread, the Breakdown pie charts were there whenever Intensity Minutes were not.
For someone reason, this only started for me on June 5 and I've only had my VAHR for a month, so I thought it was new. It would be nice if they created a report to show progress.
Hi - new VA 3 owner defecting from the Fitbit ranks. As Fitbit provides this sort of data, and as I have over 4 years of said data captured in a spreadsheet, I was hoping to find this info readily available via Garmin Connect. After some snooping (I'm a software developer) I discovered Garmin is sending this data to the daily summary webpage ("highlyActiveSeconds","activeSeconds", "sedentarySeconds", "sleepingSeconds") but is no longer drawing the breakdown pie chart. I tweeted to Garmin about this but haven't received a response yet.
I definitely want to avoid having to open Chrome's devtools to gather this data every day, so it'd be nice if Garmin added it back.