I found this kind of cycle barrier in Oldenburg right here:
There are 2-3 similar barriers in the same region.
Problem: there is no design specified in openstreetmap fitting for those. How can this be solved?
(I mean the list below “Types / designs of cycle barriers” here: Cycle barrier in OSM Wiki )
My guess is that isn’t a cycle barrier at all. For me it seems to be a special form of removable or foldable bollard for blocking two track vehicles but allows emergence vehicles to open them.