Independent ranking of bicycles aerodynamics Are there any scientific and independent evaluations of different bicycles from an aerodynamics perspective?
Aerodynamic testing is expensive, difficult and controversial. It's controversial because there are no real agreed on standardized methods for testing and what test setups replicate real world riding conditions.

Any research lab that does such tests are likely to sell the valuable data to manufacturers, rather than publishing it to the world for free.

Hambini (YouTuber, blogger and real-life aerodynamics engineer) did a comprehensive test of wheels and published the results on his blog, but I think he took them down. (Warning, if you watch his videos: he swears a lot and is very forthright in his very negative opinions of certain people and companies.)