This module has a relay output, so acts like a switch. However, you can't create pulses, for example to simulate a push button. So I'd say no, you can't simulate a long press to dim a Hue bulb. However, if you have a home automation system between this module and a Hue bulb (as I do with Homeassistant) then you can create all sorts of interactions with the bulb and the switch. The possibilities are endless!

Hue is itself Zigbee and does not need the ZB mini. What you need is a Zigbee button (e.g. Feller).