Pulse Dimming to 1-10V
Typical LED drivers have no way of staying in sync. Each device's driver will have a free-running oscillator to control the PWM.

Figure 1. Input circuitry of some Mean Well LED PSUs. Image source: LEDnique.
This circuit can be driven by a potentiometer, a 0 - 10 V (or 1 - 10 V) source or a PWM signal but the end result is always the same: an analog voltage reaches the IN control pin. See my linked article for more detail.
Maybe you have a different kind of driver but it's not clear from the question.