LONDON — British fashion school graduate Phoebe St. Leger’s dream of landing a job at a design label is on hold. Like many others in the global Class of 2020, the pandemic is clouding her career ambitions. The coronavirus forced the cancellation of her university graduating class’s final-year fashion show, removing the chance to show her knitwear collection to people in the industry, some of whom might have liked her work enough to offer her a job. Instead, St.