Maybe, however it looks better or to be a bit more objective, Breeze is also incomplete for Plasma 6, take a look at the icon pack applied in Dolphin for instance:
The Iconpack used in Breath looks plain consistent, the one I get with Breeze looks like a bug to be honest.
Fortunately I can use the Breeze Theme and apply the Breath icon pack(and accent colour) to it, but still, I assume this will get fixed soon, but if not I am going to report it as well.