Does Z-Wave Poller work with custom drivers?

I'm new to hubitat and I'm working on a custom driver for a bunch of old zwave dimmers Aeotec dsc25-zwus. They are non-plus so they need to be polled for state changes.

Issue is, the zwave poller app doesn't allow me to select these devices if they use my custom driver. They don't show up in the list as possible options.

I added the "Polling" capability to the driver. Is there anything else I need to do?

That is correct. The poller app only looks for generic (built-in drivers). You can call polling from any custom or built-in app like Rule Machine, but you have to have the poll() method added to your driver, and use the app of your choice to call that method on your own schedule.