From a lot of experience of trying exactly this, I would advise that you don’t use midi for clock - you will get lots of jitter and an unstable clock in VCV.
Instead use CV tools in Ableton to generate a 24ppqn audio pulse clock and a run trigger. Use Soundflower/Blackhole to send that clock into VCV. In VCV use the Impromptu Clocked module and send the clock into the BPM input and the the run trigger into the run input. Set Clocked mode to P24 (24ppqn).
That way you will get perfectly stable sync.