While adding this part, I was wondering that there is now first a note about AdvancedNameConverterInterface to access this data and then a note about it also being available via the parent interface NameConverterInterface. However, the discussion about AdvancedNameConverterInterface deprecated appears to have yielded no result: symfony/symfony#54531 (comment).

Thank you, Matthias! I've moved your contribution to a new article, as we've rewritten the Serializer docs in the past weeks.