What next update is after subway surfers Sydney?

As of my limited knowledge up to January 2022, the latest update for Subway Surfers after the Sydney update was the World Tour: Mexico City update, released in April 2022. However, there have likely been more updates released after this date.

To stay up-to-date with the latest Subway Surfers updates and releases, I recommend checking the official Subway Surfers website, official social media accounts, or the game's app store page.