I've heard that there is an extension to 25th April 2021, but unfortunately I don't have a link to the supporting paperwork.
Edit: here's the document from the Dutch government:
https://www.ilent.nl/onderwerpen/cor...gdheid-met-pbn And this one for Lithuania:
https://tka.lt/assets/uploads/sites/...2020-1-PBN.pdf Check your own NAA for the version that is applicable in your situation.