The data is by “Fatal Accident Rate (Cars per Billion Vehicle Miles)”, Model Y having 10.6, Model S having 5.8. Ignoring Model 3, the average would be 8.2. Back in 2023 Tesla tweeted “Total miles driven by the Tesla fleet has exceeded 100 billion miles globally—equal to 532 round trips to the sun!”
So that math says 820 fatal accidents, Tesladeaths reports 614. I’d say the numbers seem close enough?