Marta Kos notes that Kyiv sees accession as ‘security guarantee’ with NATO membership unlikely in near future

“I can also understand why President Zelenskyy was saying this date. He knows that in the near future Ukraine will not be able to become a member of NATO, so he is looking for security guarantees,”

https://www.aa.com.tr/en/europe/ukraines-eu-membership-by-2027-impossible-says-enlargement-commissioner/3877328