https://www.epo.org/en/service-support/faq/law-practice/unitary-patent/register-unitary-patent-protection/will-european
Will the European Patent Register show any opt-outs from the competence of the Unified Patent Court?
Yes, starting from the date of entry into force of the Agreement on a Unified Patent Court on 1 June 2023, the European Patent Register shows whether a European patent has been opted out of the exclusive competence of the Unified Patent Court.