I'm still confused by this chart. Nuclear is shown to be a bit more than half the addition of wind power but if you look at the bar chart for electricity, it's suddenly only a small fraction. How does that fit together?

This chart is ultra-processed data. It's a one-year delta. That's the problem. The usual presentation for this data looks like this.[1]

[1] https://www.eia.gov/todayinenergy/detail.php?id=65445