I have HA yellow here connected to about 10 of these (RWL-021) switches. Only quirk I found is that with a smaller network, if they become unavailable through bad connection, you have to really delete the device from the ZHA list to get it to recouple. Im no home automation pro, but it felt like I had to delete it twice before they would pair again. Now my network is fully on, they don't lose connection anymore so it's no longer an issue.
Look up dimmer switch automation blueprints on the HA forum and spare yourself the time to make your own. After that you can change the settings in the HA ui, no yaml required.
Thanks, that helped. It wasn't such a bad problem, but even then there was a fix al along! First time I ever had to put a piece of mobile software in the correct phone (android) mode :) .