IKEA FYRTUR block-out roller blind support - No entity 'Position' available

I recently connected one of my Ikea Fyrtur blinds to Home Assistant. I use a Zigbee stick and Zigbee2mqtt

The buttons i get are up (rolls the blinds up till highest position) and down (rolls the blinds down till end position).

I also see a ‘stop’ button, but that isn’t working, it’s either full up or full down.

I want to make some buttons, for getting my blinds to 25, 50 or 75%, but in the entities of the blinds i’m missing the ‘position’.

According to the documentation i could find, the Fyrtur blinks have a position state, or am i wrong?