Strange, it have the bad state by defaut https://github.com/dresden-elektronik/deconz-rest-plugin/blob/master/devices/ikea/fyrtur_block-out_roller_blind.json
And not easy to correct that using docker.
For me the easier thing, is creating a new DDF with the status"Gold" in the folder for HA /data/.local/share/dresden-elektronik/deCONZ/devices/ (and yes this folder can be empty, if it’s your first DDF)
After that, when you make right clic + edit DDf, you need to see this one on the editor title bar.