It can be part of the installation's protection against movement or tipping. Disconnecting it for cleaning or repair access is not a casual owner task.
What the observation means
A range can be heavy and connected to concealed gas and electrical services. A restraint that limits movement may be doing exactly what it is intended to do.
A useful next step
Tell the repair team if a restraint is present or access is limited. Do not cut it, unhook it or pull harder against it. Appropriate people should plan movement and reconnection, rather than treating the restraint as an obstruction to be defeated.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.