In a recent interview, Canon executives confirmed that eye-controlled autofocus will be coming to more Canon EOS R cameras in the future:
Q: Many users were excited to see the return of eye-controlled autofocus on the EOS R3. Has the new eye-controlled AF met Canon's expectations, and can we expect to see it on more bodies in the future?
A: It's our mission as a camera manufacturer to figure out ways to make any camera system easier and more comfortable to operate. So, in terms of the eye control system, or eye-controlled focus, we intend to deploy this to various other models as well. At the same time, we’d like to improve the performance and usability.
Read the full interview at Dpreview