It is a regulatory norm that a representative of the coaching staff must attend the post-match press conference.
At the conference, Dynamo's acting head coach Oleksandr Shovkovskyi answered every question asked by journalists. Even when certain media representatives strongly provoked the coach, as you can see from official sources.
Other post-match interviews are not mandatory, including those of Kryvbas' YouTube channel. FC Dynamo Kyiv complied with all the regulations.