"The dominance in first approval by the FDA is related to its relatively faster review process" https://drugpricinglab.org/wp-content/uploads/2019/10/DPL-Brief-Report-Fact-check-time-to-market-new-drugs-in-US-and-other-countries-2019.pdf …
"In a study of review times for new therapeutic agents ... the median time from filing to approval by the FDA was 304 days, whereas median time to approval for the EMA and Health Canada were modestly longer at 371 days and 364 days, respectively."