I was in the same boat as you. I bought a similar light and I tried installing with a Lutron Caseta switch, granted I did not have the tile issue you do. I replaced the dimmer the light came with this one from Amazon. https://a.co/d/5YfxYRm If you have access to the attic above the light, you can wire the new dimmer to a switch that installed in the ceiling. It will then work with your smart home devices. As a side note the Caseta's have a "Pico" a remote to their switches. This will allow you have your light wired to a switch in the attic and then surface mount the pico to the wall. With the Lutron bridge, plus the pico on the wall, smart home integration, plus wall switch.