How to integrate

Hi all.
I’m new on smart house on the process of a new building. I would like some help in which is the approach and I have some questions.
1 Can Xiaomi zigbee light switches dimm dumb lamps.
2. Xiaomi Philips Zhirui downlights can be dimmed by any switch or just the app?
3. There is any solution on z-wave or zigbee to achieve that integration or will have to go with modules.
I’m in Australia, things are still quite expensive here to put hue thru all house.