The following extract is from the official ILAC notification.
"As a result of the recent referendum detailed in our earlier correspondence (provided below), the transition period for ISO/IEC 17025:2017 has been extended to 1 June 2021.
This extension to the transition period has been adopted due to the global impact of the coronavirus disease 2019 (COVID-19) outbreak and subsequent health and safety measures implemented by most economies. The extension will ensure all accreditation bodies and the accredited laboratories are able to achieve the remaining transitions in a robust manner.
The Joint ILAC-ISO Communiqué on the recognition of ISO/IEC 17025 during a Three-Year Transition has been revised to reflect this extension to the transition period and is now available from https://ilac.org/about-ilac/partnerships/international-partners/iso/"