Xioami Stand Fan 2 Pro - delaing turn off (Dashboard)

Hi. I am struggling with the problem of delaying the turn off of the Xioami Stand Fan 2 Pro fan.

I want the slider to operate in the range of 0 - 120 minutes.

Unfortunately, despite entering these values, the slider still has maximum = 480 min.

In the Xioami Home application you can set 2,4,6,8 hours, i.e. 8h x 60m = 480, but I want to narrow this range in HA, because it is difficult to set the time in the Home Assistant application on the phone when max = 480min.

I don’t know where I’m making a mistake?

Can You help me.
Thank you in advance.