For two countries relatively the same size, this disparity is mind boggling.

The US has some of the richest solar resources in the world along with great wind.

The cost and time to get to 90% carbon free would be much lower with better transmission.

July 2021 (and still true today)
https://www.theatlantic.com/science/archive/2021/07/america-is-bad-at-building-power-lines-lets-fix-that-transmission-climate/619591/