By Emily Hawkins Coat maker Canada Goose and make-up seller Estee Lauder both issued stark sales warnings yesterday due to Covid curbs in China. It comes as Chinese authorities have set out a seven-day lockdown in Zhengzhou, impacting the world’s largest iPhone factory. Canada Goose said yesterday that it was slashing its full-year revenue forecast due to pandemic-linked measures impacting luxury parka sales in China. It cut its fiscal 2023 sales expectation to a range of $1.2-1.3bn Canadian dollars, down from $1.3-1.4bn. However, demand for luxury products had continued to remain strong ahead…