"As you can see from the graph, March 2022 was also tied for the coldest of the nine second-year La Niña events on record, for this time of year."

Important observation but the graph is not able to be seen i.e. you can see the 2022 line but the other la Ninas are too faint to see.

There was a graph last long where one could see all two year La Ninas

I realize that it is tough to get good resolution on that kind of graphic. But it is an important observation so it might be worth the effort to improve it.