Those that purchased the Far Cry 5 season pass (or Gold Edition) can now download their free copy of the Far Cry 5 Classic Edition. So far, the listing is available on the PlayStation Store. I can’t see the listing on the web interface of the Xbox Store, but I’m sure it’s available on console.
The Classic Edition of the game has been updated to run smoothly on all platforms. It’ll also be available to purchase separately a later date, but Ubisoft hasn’t made it known when this will be available.