No "brightness" action in Ikea Tradfri 1743 switch on z2m/ezsp

I am moving devices from cc2531 to sonoff-e (“ezsp” in z2m) and the 1743 switch lost its brightness actions in HA. Is that configurable somehow?

Disabling “legacy” in z2m did not have any effect. I had a similar issue with Tuya buttons (some were sending only double clicks and some only long clicks) but that got fixed itself :-/