Blue Series 2-1 Fan Switch (VZM35-SN) odd behavior switching between ZHA and z2m in Home Assistant

This is a continuation of this thread in a new topic, as recommended by @chack.

I recently switched from ZHA to zigbee2mqtt due to a plethora of issues with ZHA. One thing that actually worked in ZHA was the fan switch. Even though it was identified as a light, I could change the speed with a corresponding dimmer value. Anything 1-33% was low, 34-66% was medium, and 67%+ was high.

Now that I’m on z2m, the switch is correctly identified as a three-speed fan, but the speeds are wonky. Low is WAY too fast, medium is faster still, and I can’t really see a different between medium and high.

I have tried running the switch in “exhaust” on/off mode. The speeds are better, but “low” is still way too fast.

Any advice for how to solve this issue?

Side question- can we have a zigbee2mqtt tag?