Why can't I find a listed single pole dual smart switch?
I'd use Insteon for this job
The type of control flexibility you want with multiple controlled devices at a single wallstation isn't really addressed by &quot;smart switches&quot; per se, as the programming becomes involved enough that a single, standalone &quot;smart&quot; wallbox control with that functionality is no longer worthwhile.  Instead, what you get into at that level are systems of lighting control, designed for complex situations where entire sets of lights can be controlled with a single button. While there are a variety of products that can handle the duty, most require special low-voltage control wires from the wallstations to a central control unit, which rules them out in a retrofit like this.  However, the Insteon system uses a mix of power-line and wireless communications that lends itself well to retrofits, and also has a FanLinc module available for precisely the job you are after; namely, controlling a fan and its associated lights (or a different set of lights) simultaneously.
In this situation, I'd use an Insteon keypad module connected to always-hot and neutral at the wallbox, while bringing that same always-hot and neutral up to the fan.  At the fan, a FanLinc module is wired, much the same way you'd do with any other fan remote receiver; this gives you full dimming control over the connected lights, as well as multi-speed control of the fan.  You can also replace the existing wallbox dimmer with an Insteon dimmer and make all the lights in the room &quot;talk&quot;, allowing for one-button scene control of both light sets from the same keypad that handles the fan.  Of course, all the Insteon gear is properly listed and labeled -- Insteon was in the &quot;smart&quot; game well before all the consumer-gadget vendors jumped on the bandwagon.