For the Zen 74 it is pretty straight forward.
First once the switch is added make sure you are using the community provided Zooz Zen Dimmer Advanced driver. Once this driver is configured you will update it's configuration for option 15 to "Disable Physical Paddle Control".
Now the switch should allow you to change it's state in Hubitat, and leave the relay on for the electrical circuit.
Now in Rule Machine you need to create two rules as below.
The arrows point to my Wiz Bulb being controlled. And the Trigger device is the Zooz Zen switch. This rule handles the simple turn on and off.
In this rule it is a little bit more complicated. First you need to set a local variable for the rule to use to store the Dim Level of the Switch. Then The rule simply activates any time the switch is held and the dimmer value changes. When that is detected it will set the local variable to the level of the zen switch and then change the light to that level. The green arrow simply points to that bulb being set to the expected value
If you want to enable scenes for the bulbs to use some of the preset color options, or light effects you will then want to go back to the settings and change the value to enable scene control. This will allow you to double, tripple, quad, quint press the buttons and then activate scenes from them. Because it has to wait to know if a scene is being activated this may delay the activation slightly by a second or 2 so keep that in mind. Once that is done each of those options represents a button push. up will be 3,5,7,9 and down will be 4,6,8.10. Then you can set the button controller app to use those buttons to activate a scene/light effect. So in my example i set doubletap up(Button 3) to activate the romance lights, and triple tap up(Button 5) for Movie time lights.
Hope that all helps