Does anyone knows of a dataset containing death toll data by age group? So far I had to stitch data from diverse sources and different timeframes. I've been able to infer directional IFRs from my analysis but I'd like to increase sample size. You can view my analysis here https://www.outhiink.com/covid-19-special-report/
This Opendata.SE question has a number of answers that have links to raw data that you can perform your own analyses by age and other demographics. There is one answer that by the description gives a full set of data for South Korea.
Here is a link to a data set with the largest volume collected from across the world, I would expect that there will be biases in collecting the data due to the nature of the collection, but you may be able to glean something useful from it.