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Junk Charts is a blog that critiques graphs as a learning tool
https://junkcharts.typepad.com/
The Pudding collects innovative visual storytelling examples.
https://pudding.cool/
Graphic Detail collects graphs published in The Economist.
https://www.economist.com/graphic-detail/
US Census graphics as a blog
https://www.census.gov/dataviz/
Tableau blog.
https://www.tableau.com/about/blog
This is just an ad.
https://flowingdata.com/2020/11/12/how-to-make-marimekko-charts-in-excel/