https://www.epo.org/en/service-support/faq/events/european-inventor-award/young-inventors-prize/conditions-proposing-4

What type of initiatives can be considered?

You may submit any idea, project or product in any field of technology which is supported by written or audio-visual material. Only public/published initiatives will be considered as this avoids the risk of unwillingly disclosing information that may impact future patent applications.