Did you notice the Canon EOS R and Canon EOS RP firmware announcement at the bottom of the Canon RF 15-35mm and 24-70mm F2.8 L IS USM Lens lens announcement press release?
Free Firmware Update
In addition, a new, free downloadable firmware update will be released in late September for the EOS R system. Those interested can download the update for their respective system via the EOS R and EOS RP support pages. The update will improve three main functions:
The firmware update aims to add detection of the subject’s eye when the subject is at a distance, improve overall AF frame tracking for moving subjects, as well as improve initial subject recognition and start tracking when subjects are at a distance.
While I already find the R and RP's AF systems to be high performing, this update will take them to an even higher level of performance.