No. A fixed rear panel can conceal moving, electrical or cooling components and is not an ordinary user-cleaning area.
What the observation tells you
Visible ice near its edge does not show the extent or cause behind it. Pulling the panel against ice can break fittings or damage parts. Online photographs of another model do not establish a safe dismantling procedure for yours.
A useful next step
Photograph only the accessible condition and note any fan noise or temperature change. Arrange a food-storage plan and follow the model's permitted owner guidance. Leave concealed-component inspection to an appropriately qualified engineer.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.