Controlling A320 autopilot with default mouse settings

Is it actually possible to control the FS2024 default A320 neo autopilot using the default mouse control settings? When hovering the mouse over the controls and holding down the left button, e.g. the altitude knob, it shows a little diagram indicating right clicking to engage managed mode. That’s fine. However, it also shows to middle click to manually set a number you have dialled in. And as far as I can tell, this doesn’t work at all. Middle clicking does absolutely nothing on the altitude or VS knobs. It appears to be impossible to actually do the “pull” movement on the knob by any means.

Due to the dreadful UI and unintuitive menus, I haven’t been able to work out if it’s possible to set the mouse into pointy arrow mode like you can in FS2020. But I shouldn’t have to do that, to be honest. It should be controllable.