All sources for the articles you’ve posted are from Ukrainian Government offices: Andriy Borysovych Yermak, Head of the Presidential Office, the Ukrainian General Staff and the office of Ukraine President Zelensky.
Pure propaganda flowing from the sewers of the corrupt Ukrainian Government.
Its a set of official statements from the Ukrainian authorities. Thats news. A statement from Sergey Lavrov would be news too.
We are all free to believe what they are saying, or not.