Now I just have to find those encoders you're talking about. It's exactly what I wanted to buy.
Apparently they were supported through the HA integration but not in the GUI. They also work with ZHA as far as I know.
I still see some on Ebay, not sure if they can be shipped to Europe though: https://www.ebay.com/itm/133779313546?hash=item1f25de538a:g:... . This tends to be an issue.
Now I just have to find those encoders you're talking about. It's exactly what I wanted to buy.