In Beyond-5G Networks, detailed end-to-end monitoring of specific application traffic will be required along with the access-backhaul-cloud continuum to enable low latency service thanks to local edge steering. Current monitoring solutions are confined to specific network segments. In-band telemetry (INT) technologies for SDN programmable data planes based on the P4 language are effective in the backhaul network segment, although limited to inter-switch latency, therefore link latencies including wireless and optical segments are excluded from INT monitoring. Moreover, information such as user equipment geolocation information would allow detailed mobility monitoring and improved cloud-edge steering policies. However, the synchronization between latency and location information, typically provided by different platforms, is hard to achieve with current monitoring systems. In this paper P4-based INT is proposed to be thoroughly extended involving the user equipment (UE). The novel INT mechanism is designed to provide synchronized and accurate end-to-end latency and geolocation information, enabling decentralized steering policies, i.e. involving the UE and selected switches, without the SDN controller intervention. The proposal also includes an Artifical Intelligence (AI)-assisted forecast system able to predict latency and geolocation in advance and trigger faster edge steering.