https://wccftech.com/fifa-21-free-next-gen-upgrade/

FIFA 21 will support free next-gen upgrades through the Dual Entitlement program.

According to the game's official website, all owners of the PlayStation 4 and Xbox One versions of the game will be able to upgrade their copy to a PlayStation 5 and Xbox Series X copy at no additional cost. All progress in FIFA 21 Ultimate Team will also carry over between versions.