Not sure if this is possible (seems tricky), but people arguably use Instagram stories far more than posts these days, so it would be awesome if Exist could pull data for those in addition to what it already does with posts/comments/likes. Attributes for number of stories posted + viewed would be great.

As Instagram also collects usage time information for all its users, if there’s a way to pull that, it would be a great data source, especially if story data cannot be pulled.

Not possible, Instagram makes very little data available via their API.