Here we have a real world Canon EOS R5 review looking at the Eye AF performance in a real world setting.
More Canon EOS R5 review stuff is listed here, for EOS R6 review stuff see here. The EOS R5 is highly regarded as a stills camera. In particular, the EOS R5 autofocus system seems to be huge leap forwards. User manual are available for download for the EOS R5 and the EOS R6.
Canon EOS R5: