Only if the plate manufacturer explicitly permits it. Decorative metallic rims can have different care limits from the underlying ceramic body.
Understanding this situation
A gentle programme reduces neither every chemical effect nor every risk to decoration. The fact that the plate previously survived a wash does not establish that repeated machine washing is recommended.
A useful next step
Check the actual item's guidance and use hand care where specified. If decoration fades or lifts, distinguish that finish damage from food residue. Do not respond with stronger detergent or repeated cycles to restore the appearance.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.