https://www.epo.org/en/service-support/faq/law-practice/disruptions-due-covid-19-pandemic-remedies-case-non-observance-3

May delays in meeting time limits be excused under the PCT EPO in view of the disruptions to public life caused by the COVID-19 pandemic?

Yes. Where a time limit under the PCT is not met due to natural calamity or other like reason in the locality where the interested party resides, has his place of business or is staying, and the relevant action is taken as soon as reasonably possible (and no later than six months after expiry of the time limit in question), the delay in meeting the time limit is excused based on a request under Rule 82quater.1 PCT. This provision applies to international applications pending in the international phase, but not to the priority period.

Please note that when Rule 82quater.1 PCT is invoked, a formal request needs to be filed with the EPO, stating how the COVID-19 pandemic affected the locality where the interested party resides.