I just installed several matter enabled Leviton D215S switches at a remote location. I'm not a WiFi device guy, but this location is unique and I have been impressed by them and their wireless three and four way options through the DAWSC add on...
Anyway, the devices are not recognized upon initial setup. Once I switched to the built-in Generic Matter Switch, all was good.
It is interesting that this device also exposes the LevelControl cluster...
Have you tried to manually assign the HE inbuilt "Generic Matter Dimmer" driver?
Is the Levitron app mentioning anything about level control?