Check its original product information or ask the cookware manufacturer. Appearance and a remembered label are weaker evidence than a confirmed specification.
What the observation means
A magnet check can provide limited information but does not establish size or overall performance. A damaged base can also differ from the original condition.
A useful next step
Avoid high-power trials to identify compatibility. Use a known suitable pan while clarifying the uncertain one. If the hob rejects several confirmed compatible pans, record their sizes and affected zones rather than assuming all the cookware changed at once.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.