One.
Report: 13-year-old dies in sleep after getting COVID-19 vaccine; CDC investigating
This may be the first. We'll see when the report comes out.
And don't get me wrong, I think it's entirely possible there have been or may be vaccine-caused deaths in the future, but if there have been the number is vanishingly small and they haven't been assigned as such by the medical professionals.
The biggest problem is people misunderstanding or misrepresenting VAERS data.