Not sure I understand your question. There's a small button on the front of the camera that activates AF. No "hack" is required. Obviously you need to be using a AF capable lens
If your camera is broken and that button is not activating AF then no, there is no way for you to activate auto focus. The camera will need to be sent in for repair.
Bay Area - CA
~R5 C (188.8.131.52) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring, BG-R10~DxO PhotoLab Elite ~DaVinci Resolve ~Windows11 Pro ~ImageClass MF644Cdw ~Pixel 8 ~CarePaks Are Worth It
The adding of dual pixel autofocus requires a change of sensor as well as a firmware upgrade. Canon no longer do the paid upgrade which is not surprising given the age of the camera and that it was superceded by the mark 2 which comes with DPAF as standard..
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.