...and the study only covered model years up to 2022. It would be interesting to compare the hybrid to the standard version. If there is a significant difference, I'd be suspicious of data quality.
The Highlander rates somewhat higher on crash ratings from what I can find (both are top picks). Also a significantly heavier vehicle (by about 10% depending on model years).
I found a discussion of the 2019 report, which was the year before the CR-V hybrid came out, and the CR-V fatality rate was 2.7.