Operation of the Unified Patent Court (UPC) is currently expected for 1st April 2023 (https://www.unified-patent-court.org/news/latest-state-play-view-launch-unified-patent-court), thus launching the sunrise period as soon as 1st January 2023.
During this sunrise period, it will be possible to opt-out European (EP) titles from the competence of the UPC. Opt-out will be possible for published EP patent applications, granted EP patents (without unitary effect) and Supplementary Protection Certificates (SPCs) issued for a product protected by a EP patent (A.83 UPCA).