Ozzy, apparently yes is the answer to your question. Please go to the Roon community website and open the LUMIN hardware discussion group and you will see someone who asked this exact same question and you can see how he has configured things
Enjoying LEEDH Processing….
With my Lumin T2 connected to my PrimaLuna integrated. I removed the pre-amp circuit completely using the HT bypass settings. I am still able to use Roon. I am hearing significantly more detail that is not analytical but more organic. The soundstage and imaging have improved very noticeably. I will go back to the full function with the pre-amp in a few weeks for comparison but I really like what I’m hearing right now. YMMV.