Port bottlenecks that have increased supply-chain congestion because of the war in Ukraine and lockdowns in China may be showing signs of easing, according to one of the world’s biggest shipping companies.

Currently, the number of ships waiting outside of the ports in Los Angeles and Long Beach have been reduced to less than 40, from more than 100 earlier this year, according to Cheng Cheng-mount, chairman of Taiwan-based Yang Ming Marine Transport Corp. The waiting time for ships at…..