BCNorwich
IMHO this is a junction rather than a crossing, OSM tags say unmarked crossing. There is no indication of a crossing, indeed (as your picture shows), vehicles are allowed to stop on the junction when the level crossing is in use. Vehicles using Burgh Road are warned of trains crossing but not warned of any other traffic crossing.

So you are correct there is no physical crossing, just a junction/crossing of cycleway and road.