Use the Nvidia GeForce or AMD Radeon official sites to update your graphics card drivers.
If your game version does not match, right-click the game in your library, select "Properties," and then "Verify integrity of game files" to trigger any missing downloads. forza horizon 5 update 1619349 1624534 0 link
For the most reliable patch notes and troubleshooting, always refer to the Official Forza Support Site . Troubleshooting Common Update Issues Use the Nvidia GeForce or AMD Radeon official