The two cavities may offer different cooking functions. A simpler control arrangement is not evidence that a selector or feature is missing.
What the observation means
One cavity may use a fixed cooking method while another has multiple modes. Their cooking charts and permitted accessories can differ even though they are part of the same cooker.
A useful next step
Use the manual's separate section for each oven. Describe the affected cavity when requesting assistance, and do not expect a programme available on one side to exist on the other. A failed function should be compared with that cavity's own specification.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.