I had read what I think you're referring to as "CFRs are always overestimated at the beginning of an outbreak and here's an example" but on second read I might have misread it.
On a quick search I couldn't find that graph, specifically, and even 2020 and 2021 estimates were lower than that.
https://www.cebm.net/covid-19/global-covid-19-case-fatality-rates/
@BE I even ran some reverse image searches - came up with very similar graphs (identical formatting, similar datapoints and sigmoids) but not this one.
I think this might be a case of "someone fabricated a graph, posted it to twitter, and spread d/misinformation"
I also think I made a mistake: I should have CWed the link as "dubious information" or maybe "disinformation check"