you could use a non-dimming switch, but...
once you turned off the switch, you wouldn't be able to control the hue bulb, and if you asked siri to "turn on all the lights" you get the annoying "some of your devices aren't responding, please check the app on your phone"
Hue now lets you set the power on state on a bulb by bulb basis, either the last state, or a generic warm white.
when you turn the leviton switch on, the hue bulb will go to whatever setting you have.
as a possible way to do what you want...
I'm not sure how the leviton switches work with home kit, but you might be able to "hot wire" the socket the bulb is in so it's always on, regardless of what position the switch is in (instead of connecting the "load" wire that runs from the socket to the switch, you would wire nut it to the hot wire in the switch box, the load connection on the switch would be unconnected) (if you're not sure what you're doing, have a handy friend, or an electrican wire this for you)
you can then set an automation in home kit that "if x device turns on then turn on other bulbs"
but this requires the switch to notify home kit when it changes. I'm not sure if the leviton switches do that, but they probably should.
If you have other switches already installed in your house, you can check, open the correct room in the home app, and watch what happens when you hit the switch in the wall, if your phone screens mimics what you do on the wall, then you're good.
This will only be good for doing certain things when the switch either turns off or on, as there's no automation for a dim event.
you could also look at the following, i have no firsthand experience with either.
both options support 3 actions (1 click, 2 click, or long click)
--fibaro button, just a giant mushroom push button, works with bluetooth, so need your phone, or an appleTV somewhat close. Comes in 2 versions, make sure to get the homekit one.
--logitech pop button, flat button, connects via a hub (hub connects to wifi) so no other devices needed to make it work.
unfortunately on both, you'd need to do one click for on, 2 for off.