The patched version of Assassin's Creed Odyssey Update 1.5.6 includes:

CE-32937-4 Fix: Clear your console cache. Power off completely, unplug for 2 minutes, restart in Safe Mode (hold power button until second beep), then select “Rebuild Database.” Redownload the patch.

Are you looking for a technical guide on how to apply this specific update to a particular platform, or are you interested in the official patch notes for the Korfu crossover expansion?

: A significant quality-of-life improvement allowing players to fast travel directly to any port on the map. Franchise Menu : Added a new menu to view and launch other Assassin's Creed titles directly from within the game. Stadia Exclusive Content

To download and install the Assassin's Creed Odyssey update 1.5.6, follow these steps: