I know how the audio recorder/mixer works. It can send out timecode. The question is, Can the Canon 5D Mark IV take that timecode in?
Sometimes a 3.5mm input can take in a timecode signal. Does that work on the 5D Mark IV?
None of the Canon 5D series cameras will read incoming timecode. You can stripe it to one of the audio channels as a reference, but there is no camera timecode function as such.
Striping the timecode to camera audio will require your Video editing package to support LTC on audio tracks. I suspect that this is possible with Davinci Resolve.