The Canon EOS R5 Review
Canon EOS R6 Review
are works in progress with the latest updates being the AF section and the addition of frame rate examples.
Scroll down one of the two reviews (same frame rate, same AF technology, same content in each) until a horseback riding image shows in the performance section.
These cameras are very impressive performers.
The sample image included in this post shows the eye-tracking AF point following the galloping horse rider near the edge of the frame during a 20 fps capture.