SYDNEY, Australia — President Trump’s infamous first phone call with Australia’s prime minister, Malcolm Turnbull, was classic Trump: demanding, transactional and eager to reject established agreements.

But when the two leaders meet in Washington on Friday, that call will be treated as dead and gone.

Officials and experts argue that Mr. Trump and Mr. Turnbull have become closer over the past year — especially as the United States seeks to play a larger role in the region, countering China and North Korea.

“Strategically, we’re very aligned,” said Amy Searight, director of the Southeast Asia program at the Center for Strategic and International Studies in Washington. “The alliance is becoming more and more important as an anchor for regional stability.”

Even as Mr. Trump’s provocative approach to foreign affairs has rattled some of America’s traditional alliances, Australia has adapted and found points of connection.