Speed control in loiter mode

Hi all,

I am new to PX4, and I would like to control the speed of the fixed-wing aircraft while it’s in the loiter mode. Basically, the input parameters should be radius, altitude, and speed. In the link below, it seems like we can only configure the radius and the minimum loitering altitude.

Is there any method to do this?

Thanks in advance.
https://docs.px4.io/master/en/flight_modes/hold.html#fixed-wing-fw