Apple has maintained a strong regional share for the North America wearables market and even enjoyed growth in terms of amount of units shipped. Discounted Apple Watch Series 3 devices and the popularity of the Series 5 smartwatches have contributed to a steep decline for Samsung in this particular sector.
https://www.notebookcheck.net/Apple-Watch-Series-3-and-Series-5-sales-help-sink-Samsung-in-the-growing-North-America-wearables-market.492484.0.html