No. Only use observation points and procedures described for owners in the manual. Removing panels changes the appliance's operating conditions and can expose hazards.
What the observation means
A cooking result or a glimpse of light is not a combustion test. Unusual smells, soot or flame concerns need an appropriately qualified assessment.
A useful next step
Stop using the cooker if gas safety is in doubt. For a suspected gas leak, follow emergency guidance. Describe what was visible during normal use without dismantling. Do not adjust an air shutter, injector or gas control to alter the flame yourself.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.