According to U.S. government data, the U.S. has recorded trade deficits with Norfolk Island for the past three years. The island exported $300,000 worth of goods to the U.S. in 2022, $700,000 in 2023 and $200,000 in 2024. Its imports from the U.S. stayed at $100,000 in those years.
https://www.thehindu.com/news/international/trumps-tariffs-target-tiny-australian-islands-including-some-with-no-people/article69407600.ece
And what about those uninhabited islands?
According to World Bank export data, the U.S. imported $1.4 million (A$2.23 million) worth of goods from Heard Island and McDonald Islands in 2022, with the vast majority classified as "machinery and electrical" products. The specific nature of these imports remains unclear.
https://economictimes.indiatimes.com/news/international/global-trends/us-news-trump-tariff-norfolk-island-we-are-scratching-our-heads-trump-imposes-29-tariff-on-tiny-remote-australian-island-with-barely-any-exports/articleshow/119941985.cms