Well, that took longer than I would have liked but today I created the Feature Request for this https://github.com/prusa3d/PrusaSlicer/issues/9852. I will look for input and feedback from the community before implementing and generating a PR. Please add your ideas and comments accordingly.
Cheers,
mak3r
mak3r created this issue in prusa3d/PrusaSlicer
open
Enable use of PrusaSlicer cooling variables in filament configuration when using Duet3d RRF
#9852