Mapping miRack through Logic into an external controller?

Hi everyone. Currently I’m trying to map miRack parameters to an external controller in Logic, specifically using miRack as an AU FX, however miRack an an AU only allows midi from the host so I can’t seen to utilize the LRN function unless I route midi from my controller directly into miRack itself.

I’m pretty new to midi routing so is there something obvious I’m missing? Or is this not possible with Logic as my Host?