I don’t own a doepfer ribbon controller, But I found the manual here:
Perhaps the R2M is set to translate the pressure sensor data to MIDI pitch/note value ?
I suggest starting out by simply sending midi note data corresponding to position, and adding pitch bend after you have that working (page 23 in the R2M manual)
Midi to CV + Pitch bend - perhaps a userfriendly module exists - i haven’t found it - but i just ordered an AKAI EWI usb, so I will be looking for one… Some tips:
https://www.reddit.com/r/vcvrack/comments/ecoahv/pitch_wheel_pitch_2_12/