Embodiments herein relate to method performed by a radio network node (12) for handling communication between wireless devices over a sidelink in a wireless communication network. The radio network node configures a wireless device by indicating a set of one or more quality of service, QoS, requirements, wherein each QoS requirement comprises a threshold associated with a QoS characteristic, and by indicating a mapping of one or more logical channel groups, LCG, reserved for buffer status report, BSR, reporting of a sidelink for data fulfilling respective QoS requirement out of the set of one or more QoS requirements.