The parent article literally says > In a summary of evidence given to UK watchdog, the Competition and Markets Authority (CMA), AWS denies that customers face a

The parent article literally says > In a summary of evidence given to UK watchdog, the Competition and Markets Authority (CMA), AWS denies that customers face any difficulty in switching from its platform. This CMA was investigating amazon's possible monopoly on cloud. So, this whole thing started rolling exactly because authorities are asking the exact same questions as you "In what way is AWS a monopoly." and in doing so, see enough leads to at least ask for reports and AWS's reply.