That I really did not expect. Would have thought I did something wrong.
I mean in any case batman "just" uses some layer 1 interface to do its layer 2 thing on top of it. So I feel like there must be a way of accomplishing this via lan port similar to the wifi interface.
@markbirss do you know someone else in the forum who may have a deeper understanding? Otherwise I would reach out to the batman guys via issue report.
And how ever this may turns out... Thanks a lot for your time and your help !