Apple has enlisted K-pop girl band NewJeans to woo users in South Korea — the home ground of arch-rival Samsung Electronics Co. — as the world’s most valuable company bets on a post-Covid global rebound in spending. The iPhone maker is opening its fifth store in the center of Seoul’s posh Gangnam district, with local media reporting plans to open a sixth this year. Seoul would then have more Apple Stores than in iPhone-loving Tokyo.