South Korean Presidential Office: ”US decision to allow Ukraine to use ATACMS shared in advance”

On the 18th (local time), the South Korean presidential office announced that "Ukraine will use the 300km-range ATACMS missiles, supported by the US, to attack the Russian mainland."
Regarding the decision by US President Biden to approve the move, he said, "The US decision was shared in advance." A senior official in the White House said in the morning that the move was made in Rio de Janeiro, Brazil, where the G20 summit will be held.
Speaking to reporters at the De Janeiro Press Center, he said, "It's not something I can give specific details about to the media," but added, "When the U.S. makes a decision, they let us know in advance,
"I would like to inform you that we have shared the decision because there is no need for our country to directly get involved in this issue or take any action," he said.
According to a report by the New York Times on the 17th (local time), President Biden
In a change of policy, Russia authorized Ukraine to "use ATACMS missiles, with a range of approximately 300 kilometers, to attack targets inside Russia."
US officials interviewed by the NYT explained that "President Biden authorized the use of ATACMS in response to Russia's decision to send North Korean troops into a war."
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