Control 3 speed ceiling fan with Homekit

Hi friends,
How would you control a ceiling fan with 3 speeds using the Apple Home app?
I have an RF controlled ceiling fan with 3 speeds + off and a reverse direction function.
I’m using a Broadlink RM4 Pro to send the RF signal (with the Broadlink binding).
Is there a way to give an order like “Hey Siri, bedroom fan speed 3” ?
And how do you convert a percentage speed to a fixed value?
Hope someone can help :pray: