PSA: Data on these kinds of questions is available. Here's the data for Chicago on Uber/Lyft vehicle type: https://data.cityofchicago.org/d/bc6b-sq4u/visualization

It will vary by year and city, but generally speaking Toyotas tend to dominate ride share with Camry usually #1, then Prius, Corolla, and RAV4. However, the long tail is very long and you're about as likely to get a ride in a less cost effective vehicle.