So I had a similar plan and setup a test rig with one of the Juno Connect smart recessed wafer lights and a Blue 2-1 switch. I was able to get bindings working but the light could not keep up with the messages from the switch. Dimming and brightening lagged the switch and worse even the state of on/off got lost if I acted too quickly on the switch… i.e. tap & hold to full bright, then tap off … light stays on but switch thinks it’s off. same in reverse. Definitely not going to hold up to my family using the switches and expecting them to “just work like normal lights”.
In contrast, the Philips Hue thin wafer light works amazingly well and keeps up 100%… but currently has a color temp change issue that the engineering team is investigating.
In the end I tested about a dozen canless light options and settled on these “dumb” Juno lights which worked flawlessly when driven by the Blue 2-1 as a dimmer. No buzz at all, dims to nearly off, just works. Not a smart bulb so you have to pick your color temp (it’s at least a switch on the LED driver), but at least it’s working buttery smooth on the 2-1.
https://www.homedepot.com/p/RL-6-in-Color-Selectable-2700K-to-5000K-Remodel-Canless-Recessed-Integrated-LED-Kit-RL6069S1EWHDMR/306673240
https://www.homedepot.com/p/Halo-RA-6-in-Selectable-CCT-New-Construction-or-Remodel-Canless-Recessed-Adjustable-Gimbal-Integrated-LED-Kit-RA6069S1EWHDMR/311306354