292 page PDF file of this Elections Assistance Commission report I came upon while looking for something else.
Thought I'd post it in case others would find it useful.
"Data from the 2022 EAVS show that 46.8% of the citizen voting age population (CVAP) in the United States voted in the 2022 general election, including more than 112 million ballots that
were cast by voters and counted."
https://www.eac.gov/sites/default/files/2023-06/2022_EAVS_Report_508c.pdf