Uploading multiple images Google Sheet Chart at once

Okay, or by another name… a 100% Stacked Bar Chart, yes?

That’s certainly possible with a combination of Glide + quickchart.
In fact, I posted an example demonstrating creating a Stacked Bar chart a while back…

The extra math required to make a 100% Stacked Bar should be reasonably straight forward with Glide computed columns.

Note that the only reason that I’m encouraging you down this path is that it will potentially save you a few manual steps, and your charts will appear instantly in the app.